Number
87
87 is a composite number, odd, a calendar year.
Properties
- Parity
- Odd
- Digit count
- 2
- Digit sum
- 15
- Digital root
- 6
- Palindrome
- No
- Divisor count
- 4
- σ(n) — sum of divisors
- 120
Primality
Prime factorization: 3 × 29
Divisors & multiples
Aliquot sum (sum of proper divisors):
33
Representations
- In words
- eighty-seven
- Ordinal
- 87th
- Roman numeral
- LXXXVII
- Binary
- 1010111
- Octal
- 127
- Hexadecimal
- 57
Also seen as
ASCII character
As an ASCII codepoint, 87 is W. Printable ASCII character W.
Hex color
#000057
RGB(0, 0, 87)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.87.