4 in Binary, Roman numerals, Hexadecimal & More

The number 4 is 100 in binary, IV in Roman numerals, 4 in hexadecimal and 4 in octal.

4 decimal = 100 binary

4 in every number system

SystemWritten as
Binary (base 2)100
Roman numeralsIV
Hexadecimal (base 16)4
Octal (base 8)4
Duodecimal (base 12)4
Ternary (base 3)11
Base 364
Vigesimal (base 20)4
Quaternary (base 4)10
Quinary (base 5)4
Senary (base 6)4

About the number 4

  • 4 is an even number.
  • 4 is not a prime number.
  • 4 is a power of two: 22.
  • 4 is a perfect square: 2 × 2.
  • Written in binary it needs 3 bits, so it fits in one byte.

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