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Natural number
Subclasses
Popular
Trending
Worst
Worst
Popular
Trending
New
Best
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Controversial
Uncontroversial
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Best
Controversial
Uncontroversial
Harshad number
Y
78%
Integer divisible by sum of its digits
Deficient number
Y
83%
Number whose divisor sum is less than itself
Automorphic number
Y
90%
a natural number whose square "ends" in the same digits as the number itself
Mersenne number
Y
90%
number of the form (2^n)โ1
Square number
Y
98%
Product of an integer with itself
Abundant number
Y
100%
Number that is less than the sum of its proper divisors
