Number
1,338
1,338 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 15
- Digital root
- 6
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 2,688
Primality
Prime factorization: 2 × 3 × 223
Divisors & multiples
Aliquot sum (sum of proper divisors):
1,350
First multiples
Representations
- In words
- one thousand three hundred thirty-eight
- Ordinal
- 1338th
- Roman numeral
- MCCCXXXVIII
- Binary
- 10100111010
- Octal
- 2472
- Hexadecimal
- 53A
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1338, here are decompositions:
- 11 + 1327 = 1338
- 17 + 1321 = 1338
- 19 + 1319 = 1338
- 31 + 1307 = 1338
- 37 + 1301 = 1338
- 41 + 1297 = 1338
- 47 + 1291 = 1338
- 59 + 1279 = 1338
Showing the first eight; more decompositions exist.
Unicode codepoint
Ժ
U+053A
Uppercase letter (Lu)
UTF-8 encoding: D4 BA (2 bytes).
Hex color
#00053A
RGB(0, 5, 58)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.58.