Number
290
290 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 3
- Digit sum
- 11
- Digital root
- 2
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 540
Primality
Prime factorization: 2 × 5 × 29
Divisors & multiples
Aliquot sum (sum of proper divisors):
250
Representations
- In words
- two hundred ninety
- Ordinal
- 290th
- Roman numeral
- CCXC
- Binary
- 100100010
- Octal
- 442
- Hexadecimal
- 122
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 290, here are decompositions:
- 7 + 283 = 290
- 13 + 277 = 290
- 19 + 271 = 290
- 61 + 229 = 290
- 67 + 223 = 290
- 79 + 211 = 290
- 97 + 193 = 290
- 109 + 181 = 290
Showing the first eight; more decompositions exist.
Unicode codepoint
Ģ
U+0122
Uppercase letter (Lu)
UTF-8 encoding: C4 A2 (2 bytes).
Hex color
#000122
RGB(0, 1, 34)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.1.34.