Number
490
490 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 13
- Digital root
- 4
- Palindrome
- No
- Divisor count
- 12
- σ(n) — sum of divisors
- 1,026
Primality
Prime factorization: 2 × 5 × 7 2
Divisors & multiples
Aliquot sum (sum of proper divisors):
536
Representations
- In words
- four hundred ninety
- Ordinal
- 490th
- Roman numeral
- CDXC
- Binary
- 111101010
- Octal
- 752
- Hexadecimal
- 1EA
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 490, here are decompositions:
- 3 + 487 = 490
- 11 + 479 = 490
- 23 + 467 = 490
- 29 + 461 = 490
- 41 + 449 = 490
- 47 + 443 = 490
- 59 + 431 = 490
- 71 + 419 = 490
Showing the first eight; more decompositions exist.
Unicode codepoint
Ǫ
U+01EA
Uppercase letter (Lu)
UTF-8 encoding: C7 AA (2 bytes).
Hex color
#0001EA
RGB(0, 1, 234)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.234.