number.wiki
Number

900

900 is a composite number, even, a calendar year.

Abundant Number Harshad / Niven Perfect Square Powerful Number Year

Properties

Parity
Even
Digit count
3
Digit sum
9
Digital root
9
Palindrome
No
Divisor count
27
σ(n) — sum of divisors
2,821

Primality

Prime factorization: 2 2 × 3 2 × 5 2

Divisors & multiples

All divisors (27)
1 · 2 · 3 · 4 · 5 · 6 · 9 · 10 · 12 · 15 · 18 · 20 · 25 · 30 · 36 · 45 · 50 · 60 · 75 · 90 · 100 · 150 · 180 · 225 · 300 · 450 · 900
Aliquot sum (sum of proper divisors): 1,921
Factor pairs (a × b = 900)
1 × 900
2 × 450
3 × 300
4 × 225
5 × 180
6 × 150
9 × 100
10 × 90
12 × 75
15 × 60
18 × 50
20 × 45
25 × 36
30 × 30
First multiples
900 · 1,800 · 2,700 · 3,600 · 4,500 · 5,400 · 6,300 · 7,200 · 8,100 · 9,000

Representations

In words
nine hundred
Ordinal
900th
Roman numeral
CM
Binary
1110000100
Octal
1604
Hexadecimal
384

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 900, here are decompositions:

  • 13 + 887 = 900
  • 17 + 883 = 900
  • 19 + 881 = 900
  • 23 + 877 = 900
  • 37 + 863 = 900
  • 41 + 859 = 900
  • 43 + 857 = 900
  • 47 + 853 = 900

Showing the first eight; more decompositions exist.

Unicode codepoint
΄
U+0384
Modifier symbol (Sk)

UTF-8 encoding: CE 84 (2 bytes).

Lookup U+0384 on Compart ↗ Lookup on FileFormat.Info ↗
Hex color
#000384
RGB(0, 3, 132)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.132.