Number
538
538 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 16
- Digital root
- 7
- Palindrome
- No
- Divisor count
- 4
- σ(n) — sum of divisors
- 810
Primality
Prime factorization: 2 × 269
Divisors & multiples
Aliquot sum (sum of proper divisors):
272
Representations
- In words
- five hundred thirty-eight
- Ordinal
- 538th
- Roman numeral
- DXXXVIII
- Binary
- 1000011010
- Octal
- 1032
- Hexadecimal
- 21A
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 538, here are decompositions:
- 17 + 521 = 538
- 29 + 509 = 538
- 47 + 491 = 538
- 59 + 479 = 538
- 71 + 467 = 538
- 89 + 449 = 538
- 107 + 431 = 538
- 137 + 401 = 538
Showing the first eight; more decompositions exist.
Unicode codepoint
Ț
U+021A
Uppercase letter (Lu)
UTF-8 encoding: C8 9A (2 bytes).
Hex color
#00021A
RGB(0, 2, 26)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.2.26.