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 140

  • There are a total of 140 distinct semimagic knight's tours on a regular chessboard
  • 140 is the smallest harmonic integer (an integer n such that the harmonic mean of its divisors is an integer) that is not multiperfect

Common Properties of 140

Abundant
Composite
Even
Odious
Practical