Meaning of abundant number

abun'dant num'ber

Pronunciation: [key]
— Math. Math.
  1. a positive number that is less than the sum of all positive integers that are submultiples of it, as 12, which is less than the sum of 1, 2, 3, 4, and 6. Cf. deficient number, perfect number.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.