79928079 has 32 divisors (see below), whose sum is σ = 139868160. Its totient is φ = 39333600.

The previous prime is 79928071. The next prime is 79928083. The reversal of 79928079 is 97082997.

It is a happy number.

It is not a de Polignac number, because 79928079 - 2³ = 79928071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79928071) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4717 + ... + 13494.

It is an arithmetic number, because the mean of its divisors is an integer number (4370880).

Almost surely, 2^79928079 is an apocalyptic number.

79928079 is a deficient number, since it is larger than the sum of its proper divisors (59940081).

79928079 is a wasteful number, since it uses less digits than its factorization.

79928079 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18251.

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 79928079 is about 8940.2504998462. The cubic root of 79928079 is about 430.7577750445.

The spelling of 79928079 in words is "seventy-nine million, nine hundred twenty-eight thousand, seventy-nine".