number.wiki
Number

1,328

1,328 is a composite number, even, a calendar year.

Deficient Number Year

Properties

Parity
Even
Digit count
4
Digit sum
14
Digital root
5
Palindrome
No
Divisor count
10
σ(n) — sum of divisors
2,604

Primality

Prime factorization: 2 4 × 83

Divisors & multiples

All divisors (10)
1 · 2 · 4 · 8 · 16 · 83 · 166 · 332 · 664 · 1328
Aliquot sum (sum of proper divisors): 1,276
Factor pairs (a × b = 1,328)
1 × 1328
2 × 664
4 × 332
8 × 166
16 × 83
First multiples
1,328 · 2,656 · 3,984 · 5,312 · 6,640 · 7,968 · 9,296 · 10,624 · 11,952 · 13,280

Representations

In words
one thousand three hundred twenty-eight
Ordinal
1328th
Roman numeral
MCCCXXVIII
Binary
10100110000
Octal
2460
Hexadecimal
530

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 1328, here are decompositions:

  • 7 + 1321 = 1328
  • 31 + 1297 = 1328
  • 37 + 1291 = 1328
  • 79 + 1249 = 1328
  • 97 + 1231 = 1328
  • 127 + 1201 = 1328
  • 157 + 1171 = 1328
  • 199 + 1129 = 1328

Showing the first eight; more decompositions exist.

Hex color
#000530
RGB(0, 5, 48)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.5.48.