number.wiki
Number

800

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

Abundant Number Achilles Number Harshad / Niven Powerful Number Year

Properties

Parity
Even
Digit count
3
Digit sum
8
Digital root
8
Palindrome
No
Divisor count
18
σ(n) — sum of divisors
1,953

Primality

Prime factorization: 2 5 × 5 2

Divisors & multiples

All divisors (18)
1 · 2 · 4 · 5 · 8 · 10 · 16 · 20 · 25 · 32 · 40 · 50 · 80 · 100 · 160 · 200 · 400 · 800
Aliquot sum (sum of proper divisors): 1,153
Factor pairs (a × b = 800)
1 × 800
2 × 400
4 × 200
5 × 160
8 × 100
10 × 80
16 × 50
20 × 40
25 × 32
First multiples
800 · 1,600 · 2,400 · 3,200 · 4,000 · 4,800 · 5,600 · 6,400 · 7,200 · 8,000

Representations

In words
eight hundred
Ordinal
800th
Roman numeral
DCCC
Binary
1100100000
Octal
1440
Hexadecimal
320

Also seen as

Goldbach decomposition

Goldbach's conjecture says every even integer greater than 2 is the sum of two primes. For 800, here are decompositions:

  • 3 + 797 = 800
  • 13 + 787 = 800
  • 31 + 769 = 800
  • 43 + 757 = 800
  • 61 + 739 = 800
  • 67 + 733 = 800
  • 73 + 727 = 800
  • 109 + 691 = 800

Showing the first eight; more decompositions exist.

Unicode codepoint
̠
U+0320
Non-spacing mark (Mn)

UTF-8 encoding: CC A0 (2 bytes).

Lookup U+0320 on Compart ↗ Lookup on FileFormat.Info ↗
Hex color
#000320
RGB(0, 3, 32)
IPv4 address

As an unsigned 32-bit integer, this is the IPv4 address 0.0.3.32.