79988988 has 24 divisors (see below), whose sum is σ = 187834192. Its totient is φ = 26492544.

The previous prime is 79988983. The next prime is 79989023. The reversal of 79988988 is 88988997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79988981) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19345 + ... + 23112.

Almost surely, 2^79988988 is an apocalyptic number.

It is an amenable number.

79988988 is an abundant number, since it is smaller than the sum of its proper divisors (107845204).

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

79988988 is a wasteful number, since it uses less digits than its factorization.

79988988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42621 (or 42619 counting only the distinct ones).

The product of its digits is 20901888, while the sum is 66.

The square root of 79988988 is about 8943.6562992995. The cubic root of 79988988 is about 430.8671665702.

Subtracting 79988988 from its reverse (88988997), we obtain a palindrome (9000009).

The spelling of 79988988 in words is "seventy-nine million, nine hundred eighty-eight thousand, nine hundred eighty-eight".