4000 (number)
From Wikipedia, the free encyclopedia
4000 (four thousand) is the natural number following 3999 and preceding 4001. It is a decagonal number.
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| Cardinal | 4000 four thousand | ||
| Ordinal | 4000th four thousandth | ||
| Factorization | <math>2^5 \cdot 5^3</math> | ||
| Roman numeral | MMMM | ||
| Roman numeral (Unicode) | MMMM, mmmm | ||
| Binary | 111110100000 | ||
| Octal | 7640 | ||
| Duodecimal | 2394 | ||
| Hexadecimal | FA0 | ||
[edit] Selected numbers in the range 4001-4999
- 4005 - triangular number
- 4007 - safe prime
- 4010 - magic constant of n×n magic square and n-Queens Problem for n = 20.
- 4013 - balanced prime
- 4019 - Sophie Germain prime
- 4028 - sum of the first 45 primes
- 4030 - 3rd weird number
- 4031 - sum of the cubes of the first six primes
- 4033 - 6th super-Poulet number
- 4060 - tetrahedral number
- 4073 - Sophie Germain prime
- 4079 - safe prime
- 4095 - triangular number
- 4096 - 12th power of two, 16th cube, 64^2, smallest number with exactly 13 divisors
- 4104 = 2^3 + 16^3 = 9^3 + 15^3
- 4127 - safe prime
- 4139 - safe prime
- 4140 - Bell number
- 4166 - centered heptagonal number, 7!-6!-5!-4!-3!-2!-1!-0!
- 4167 - 7!-6!-5!-4!-3!-2!-1!
- 4168 - 7!-6!-5!-4!-3!-2!
- 4170 - 7!-6!-5!-4!-3!
- 4176 - 7!-6!-5!-4!
- 4181 - Fibonacci number, Markov number
- 4186 - triangular number
- 4187 - factor of R13. Also record number of wickets taken in first-class cricket by Wilfred Rhodes.
- 4199 - highly cototient number
- 4200 - nonagonal number, pentagonal pyramidal number, 7!-6!-5!
- 4210 - 11th semi-meandric number
- 4211 - Sophie Germain prime
- 4219 - cuban prime of the form x = y + 1
- 4223 - Kynea number
- 4225 = 65^2, centered octagonal number
- 4227 - sum of the first 46 primes
- 4240 - Leyland number
- 4257 - decagonal number
- 4259 - safe prime
- 4271 - Sophie Germain prime
- 4278 - triangular number
- 4283 - safe prime
- 4289 - highly cototient number
- 4320 - 7!-6!
- 4324 - 23rd square pyramidal number
- 4349 - Sophie Germain prime
- 4356 - sum of the cubes of the first eleven integers, 66^2
- 4369 - 7th super-Poulet number
- 4371 - triangular number
- 4373 - Sophie Germain prime
- 4391 - Sophie Germain prime
- 4397 - Year of Comet Hale-Bopp's return, a prime number
- 4400 - the number of missing persons in the sci-fi show The 4400
- 4409 - Sophie Germain prime, highly cototient number, balanced prime
- 4411 - centered heptagonal number
- 4421 - alternating factorial
- 4438 - sum of the first 47 primes
- 4446 - nonagonal number
- 4447 - cuban prime of the form x = y + 1
- 4457 - balanced prime
- 4465 - triangular number
- 4481 - Sophie Germain prime
- 4489 = 67^2, centered octagonal number
- 4495 - tetrahedral number
- 4503 - largest number not the sum of four or fewer squares of composites
- 4505 - 5th Zeisel number
- 4522 - decagonal number
- 4547 - safe prime
- 4560 - triangular number
- 4579 - octahedral number
- 4597 - balanced prime
- 4607 - Woodall number
- 4619 - highly cototient number
- 4620 - the number appearing on all cheques in the Check Game (aka Blank Check) on the U.S. TV game show The Price Is Right
- 4624 = 68^2
- 4641 - magic constant of n×n magic square and n-Queens Problem for n = 21.
- 4656 - triangular number
- 4657 - balanced prime
- 4661 - sum of the first 48 primes
- 4663 - centered heptagonal number
- 4679 - safe prime
- 4681 - 8th super-Poulet number
- 4691 - balanced prime
- 4699 - nonagonal number
- 4703 - safe prime
- 4705 = 48² + 49² = 17² + 18² + ... 26²
- 4727 - sum of the squares of the first twelve primes
- 4733 - Sophie Germain prime
- 4753 - triangular number
- 4761 = 69^2, centered octagonal number
- 4787 - safe prime
- 4788 - 14th Keith number
- 4793 - Sophie Germain prime
- 4795 - decagonal number
- 4799 - safe prime
- 4801 - cuban prime of the form x = y + 2, smallest prime with a composite sum of digits in base 7
- 4847 - smallest remaining candidate for the Seventeen or Bust project to solve the Sierpinski problem; it is unknown whether 4847×2n+1 is prime for any n
- 4851 - triangular number, pentagonal pyramidal number
- 4862 - Catalan number
- 4871 - Sophie Germain prime
- 4879 - 11th Kaprekar number
- 4888 - sum of the first 49 primes
- 4900 - the only square-pyramidal square other than 1[1], 70^2
- 4913 - 17th cube
- 4919 - Sophie Germain prime, safe prime
- 4922 - centered heptagonal number
- 4941 - centered cube number
- 4943 - Sophie Germain prime
- 4950 - triangular number, 12th Kaprekar number
- 4959 - nonagonal number
- 4960 - tetrahedral number; greater of 4th pair of Smith brothers
- 4993 - balanced primefr:Nombres 4000 à 4999
