Number Gossip

(Enter a number and I'll tell you everything you wanted to know about it but were afraid to ask.)

Unique Properties of 30

  • 30 is the first sphenic number, that is the smallest number with 3 distinct prime divisors
  • 30 is the largest number with the property that all smaller numbers coprime to it are prime
  • Up to rotations of a cube, there are 30 different ways to put numbers 1 though 6 on a die
  • Both a dodecahedron and an icosahedron have 30 edges
  • There are 30 numbers with zeroless pandigital squares

Rare Properties of 30

Primorial
Pronic (Heteromecic)

Common Properties of 30

Abundant
Composite
Even
Evil
Practical
Square-free