Number
1,288
1,288 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 19
- Digital root
- 1
- Palindrome
- No
- Divisor count
- 16
- σ(n) — sum of divisors
- 2,880
Primality
Prime factorization: 2 3 × 7 × 23
Divisors & multiples
Aliquot sum (sum of proper divisors):
1,592
First multiples
Representations
- In words
- one thousand two hundred eighty-eight
- Ordinal
- 1288th
- Roman numeral
- MCCLXXXVIII
- Binary
- 10100001000
- Octal
- 2410
- Hexadecimal
- 508
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1288, here are decompositions:
- 5 + 1283 = 1288
- 11 + 1277 = 1288
- 29 + 1259 = 1288
- 59 + 1229 = 1288
- 71 + 1217 = 1288
- 101 + 1187 = 1288
- 107 + 1181 = 1288
- 137 + 1151 = 1288
Showing the first eight; more decompositions exist.
Unicode codepoint
Ԉ
U+0508
Uppercase letter (Lu)
UTF-8 encoding: D4 88 (2 bytes).
Hex color
#000508
RGB(0, 5, 8)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.8.