Number
0
0 — Zero
0 is even.
Zero is the additive identity of the integers. It is neither positive nor negative, and is the only integer that is neither prime nor composite. The Babylonians used a placeholder for zero by 300 BCE, but its treatment as a true number is generally credited to Indian mathematicians, with Brahmagupta giving the first explicit rules for arithmetic with zero in 628 CE.
Properties
- Parity
- Even
- Digit count
- 1
- Digit sum
- 0
- Digital root
- 0
- Palindrome
- Yes
- Divisor count
- 1
- σ(n) — sum of divisors
- 1
Representations
- In words
- zero
- Ordinal
- 0th
- Binary
- 0
- Octal
- 0
- Hexadecimal
- 0
Also seen as
ASCII character
As an ASCII codepoint, 0 is NUL (null). ASCII control character.
Hex color
#000000
RGB(0, 0, 0)
IPv4 address
As an unsigned 32-bit integer, this is the IPv4 address 0.0.0.0.