Number tools
Interactive tools to check primality, find factors, convert bases, and compute GCD and LCM with links to full number pages.
Prime checker
Instantly check whether a number is prime.
Examples: 97, 360
Factor finder
List every divisor of a number.
Examples: 360, 84
Prime factorization
Break a number into prime factors.
Examples: 84, 360
Roman numerals converter
Convert a number to Roman numerals.
Examples: 2026, 360
Base converter
Convert a decimal number to binary, octal, hex, and base 36.
Examples: 255, 360
Binary converter
Convert decimal to binary.
Examples: 255, 8
Hex converter
Convert decimal to hexadecimal.
Examples: 255, 360
Octal converter
Convert decimal to octal.
Examples: 64, 360
GCD calculator
Compute the greatest common divisor of two numbers.
Examples: 360,48, 97,360
LCM calculator
Compute the least common multiple of two numbers.
Examples: 12,18, 360,48