Number
1,398
1,398 is a composite number, even, a calendar year.
Properties
- Parity
- Even
- Digit count
- 4
- Digit sum
- 21
- Digital root
- 3
- Palindrome
- No
- Divisor count
- 8
- σ(n) — sum of divisors
- 2,808
Primality
Prime factorization: 2 × 3 × 233
Divisors & multiples
Aliquot sum (sum of proper divisors):
1,410
First multiples
Representations
- In words
- one thousand three hundred ninety-eight
- Ordinal
- 1398th
- Roman numeral
- MCCCXCVIII
- Binary
- 10101110110
- Octal
- 2566
- Hexadecimal
- 576
Also seen as
Goldbach decomposition
Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1398, here are decompositions:
- 17 + 1381 = 1398
- 31 + 1367 = 1398
- 37 + 1361 = 1398
- 71 + 1327 = 1398
- 79 + 1319 = 1398
- 97 + 1301 = 1398
- 101 + 1297 = 1398
- 107 + 1291 = 1398
Showing the first eight; more decompositions exist.
Unicode codepoint
ն
U+0576
Lowercase letter (Ll)
UTF-8 encoding: D5 B6 (2 bytes).
Hex color
#000576
RGB(0, 5, 118)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.118.