79871988 has 48 divisors (see below), whose sum is σ = 217534464. Its totient is φ = 22333920.

The previous prime is 79871929. The next prime is 79872019. The reversal of 79871988 is 88917897.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6168 + ... + 14063.

It is an arithmetic number, because the mean of its divisors is an integer number (4531968).

Almost surely, 2^79871988 is an apocalyptic number.

It is an amenable number.

79871988 is an abundant number, since it is smaller than the sum of its proper divisors (137662476).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79871988 is a wasteful number, since it uses less digits than its factorization.

79871988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20292 (or 20290 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 57.

The square root of 79871988 is about 8937.1129566544. The cubic root of 79871988 is about 430.6569873996.

The spelling of 79871988 in words is "seventy-nine million, eight hundred seventy-one thousand, nine hundred eighty-eight".