Welcome to the Number Dictionary!

This website is an informational resource for the fascinating properties of numbers and numeral systems.

Representation numerals
Greek
Arabic
Roman
Maya
Chinese
Hebrew
Numeral systems
Binary
Base-3
Base-4
Base-5
Base-6
Septimal
Octal
Hexadecimal
Base-24
Base-36
Multi-Polygonal numbers
Triangular
Square
Pentagonal
Hexagonal
Heptagonal
Octogonal
Special numbers
Primes
Gaussian primes
Fibonacci
Perfect numbers
Sums & other
Difference of 2 squares
Sum of all divisors
Divisors
Factorization

Begin with a random number: 37, or use the search on the top.