Dictionary.com

deficient number

Save This Word!

noun Mathematics.
a positive number that is greater than the sum of all positive integers that are submultiples of it, as 10, which is greater than the sum of 1, 2, and 5.
QUIZ
QUIZ YOURSELF ON “ITS” VS. “IT’S”!
Apostrophes can be tricky; prove you know the difference between "it’s" and "its" in this crafty quiz!
Question 1 of 8
On the farm, the feed for chicks is significantly different from the roosters’; ______ not even comparable.
Also called defective number.

Origin of deficient number

First recorded in 1720–30
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

How to use deficient number in a sentence

FEEDBACK