8000 (number)
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8000 (eight thousand) is the natural number following 7999 and preceding 8001.
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| Cardinal | 8000 eight thousand |
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| Ordinal | 8000th eight thousandth |
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| Factorization |  |
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| Roman numeral | VMMM | ||
| Roman numeral (Unicode) | VMMM, vmmm | ||
| Binary | 1111101000000 | ||
| Octal | 17500 | ||
| Duodecimal | 4768 | ||
| Hexadecimal | 1F40 | ||
8000 is the cube of 20, as well as the sum of four consecutive integers cubed, 113 + 123 + 133 + 143.
The fourteen tallest mountains on Earth, which exceed 8000 meters in height, are sometimes referred to as eight-thousanders.
[edit] Selected numbers in the range 8001 - 8999
- 8001 - triangular number
- 8002 - Mertens function zero
- 8011 - Mertens function zero
- 8012 - Mertens function zero
- 8017 - Mertens function zero
- 8021 - Mertens function zero
- 8039 - safe prime
- 8069 - Sophie Germain prime
- 8093 - Sophie Germain prime
- 8100 = 90^2
- 8111 - Sophie Germain prime
- 8117 - balanced prime
- 8119 - octahedral number
- 8125 - pentagonal pyramidal number
- 8128 - perfect number, harmonic divisor number, 127th triangular number, 64th hexagonal number, eighth 292-gonal number, fourth 1356-gonal number
- 8147 - safe prime
- 8189 - highly cototient number
- 8190 - harmonic divisor number
- 8191 - Mersenne prime
- 8192 - power of two
- 8233 - centered heptagonal number
- 8243 - Sophie Germain prime
- 8256 - triangular number
- 8257 - sum of the squares of the first fourteen primes
- 8269 - cuban prime of the form x = y + 1
- 8273 - Sophie Germain prime
- 8281 - sum of the cubes of the first thirteen integers, 91^2, nonagonal number, centered octagonal number
- 8321 - super-Poulet number
- 8326 - decagonal number
- 8361 - Leyland number
- 8385 - triangular number
- 8423 - safe prime
- 8436 - tetrahedral number
- 8464 = 92^2
- 8513 - Sophie Germain prime
- 8515 - triangular number
- 8543 - safe prime
- 8555 - square pyramidal number
- 8576 - centered heptagonal number
- 8625 - enneagonal number
- 8646 - triangular number
- 8649 = 93^2, centered octagonal number
- 8663 - Sophie Germain prime
- 8693 - Sophie Germain prime
- 8695 - decagonal number
- 8699 - safe prime
- 8712 - smallest number that is divisible by its reverse: 8712 = 4×2178 (excluding palindromes and numbers with trailing zeros)
- 8713 - balanced prime
- 8741 - Sophie Germain prime
- 8747 - safe prime, balanced prime
- 8778 - triangular number
- 8783 - safe prime
- 8801 - magic constant of n×n magic square and n-Queens Problem for n = 26.
- 8819 - safe prime
- 8833 - 88^2 + 33^2
- 8836 = 94^2
- 8855 - member of a Ruth-Aaron pair (first definition) with 8856
- 8856 - member of a Ruth-Aaron pair (first definition) with 8855
- 8911 - Carmichael number, triangular number
- 8926 - centered heptagonal number
- 8944 - sum of the cubes of the first seven primes
- 8951 - Sophie Germain prime
- 8963 - safe prime
- 8969 - Sophie Germain prime
- 8976 - enneagonal number
