79518820 has 24 divisors (see below), whose sum is σ = 174250944. Its totient is φ = 30424416.

The previous prime is 79518799. The next prime is 79518847. The reversal of 79518820 is 2881597.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85974 + ... + 86893.

It is an arithmetic number, because the mean of its divisors is an integer number (7260456).

Almost surely, 2^79518820 is an apocalyptic number.

It is an amenable number.

79518820 is an abundant number, since it is smaller than the sum of its proper divisors (94732124).

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

79518820 is a wasteful number, since it uses less digits than its factorization.

79518820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172899 (or 172897 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 79518820 is about 8917.3325608054. The cubic root of 79518820 is about 430.0213077597.

The spelling of 79518820 in words is "seventy-nine million, five hundred eighteen thousand, eight hundred twenty".