Number
1,228
1,228 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 13
- Digital root
- 4
- Palindrome
- No
- Divisor count
- 6
- σ(n) — sum of divisors
- 2,156
Primality
Prime factorization: 2 2 × 307
Divisors & multiples
Aliquot sum (sum of proper divisors):
928
First multiples
Representations
- In words
- one thousand two hundred twenty-eight
- Ordinal
- 1228th
- Roman numeral
- MCCXXVIII
- Binary
- 10011001100
- Octal
- 2314
- Hexadecimal
- 4CC
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1228, here are decompositions:
- 5 + 1223 = 1228
- 11 + 1217 = 1228
- 41 + 1187 = 1228
- 47 + 1181 = 1228
- 131 + 1097 = 1228
- 137 + 1091 = 1228
- 167 + 1061 = 1228
- 179 + 1049 = 1228
Showing the first eight; more decompositions exist.
Unicode codepoint
ӌ
U+04CC
Lowercase letter (Ll)
UTF-8 encoding: D3 8C (2 bytes).
Hex color
#0004CC
RGB(0, 4, 204)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.4.204.