Number reference
500 explained.
500: five hundred, composite; factors, prime factorization, roots, binary, hexadecimal, and digit properties.
Identity and representations
- Written form
- five hundred
- Classification
- composite
- Factors
- 1, 2, 4, 5, 10, 20, 25, 50, 100, 125, 250, 500
- Prime factorization
- 2 × 2 × 5 × 5 × 5
- Square root
- 22.36068
- Cube root
- 7.937005
- Binary
- 111110100
- Octal
- 764
- Hexadecimal
- 1F4
- Roman numeral
- D
- Digit sum
- 5
- Digital root
- 5
What makes 500 notable
- Factor structure. 500 breaks down into 2 distinct primes (2, 5) and has 12 divisors in total, so it can be split into equal whole-number groups 10 ways beyond 1 and itself.
500 in everyday use
Five hundred is the Roman numeral D, and it names some of the best-known lists and races in the United States: the Fortune 500 ranks the largest companies by revenue, the S&P 500 tracks roughly five hundred large stocks, and the Indianapolis 500 is a 500-mile race run since 1911. Online it is the generic server-error code, HTTP 500, returned when something has gone wrong and the server will not say what. A 500-euro note existed until issuance stopped in 2019.
Arithmetically 500 is 2² × 5³, with twelve divisors, and it is a sum of two squares in two ways: 10² + 20² = 100 + 400 and 22² + 4² = 484 + 16. It is 111110100 in binary and 1F4 in hexadecimal. Its digit sum is 5, which divides it, so it is a Harshad number. It is one less than 501 = 3 × 167 and one more than 499, the largest prime below it.
Nearby numbers
How to read this page
The factor list shows every way 500 splits into equal whole-number groups — 12 divisors in total. The prime factorisation is the compact form of that same information, and the base conversions restate 500 for contexts that do not use decimal.
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