+An **abundant number** is a natural number whose sum of proper divisors is greater than the number itself. The smallest is 12, as its proper divisors (1, 2, 3, 4, 6) sum to 16. These numbers contrast with [Perfect Numbers](/wiki/perfect_number) and [Deficient Numbers](/wiki/deficient_number), where the sum is equal to or less than the number, respectively.
+## See also
+- [Perfect Number](/wiki/perfect_number)
+- [Deficient Number](/wiki/deficient_number)
+- [Number Theory](/wiki/number_theory)
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