deficient number
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.
Also called
defective number.
Compare
abundant number,
perfect number.
Origin of deficient number
First recorded in 1720–30
Words nearby deficient number
deficiency account,
deficiency disease,
deficiency judgment,
deficiency symptom,
deficient,
deficient number,
deficit,
deficit financing,
deficit spending,
defier,
defilade