79039820 has 24 divisors (see below), whose sum is σ = 166385184. Its totient is φ = 31539456.

The previous prime is 79039789. The next prime is 79039823. The reversal of 79039820 is 2893097.

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (79039823) 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, 4097 + ... + 13223.

It is an arithmetic number, because the mean of its divisors is an integer number (6932716).

Almost surely, 2^79039820 is an apocalyptic number.

It is an amenable number.

79039820 is an abundant number, since it is smaller than the sum of its proper divisors (87345364).

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

79039820 is a wasteful number, since it uses less digits than its factorization.

79039820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9569 (or 9567 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 79039820 is about 8890.4341851228. The cubic root of 79039820 is about 429.1561239542.

The spelling of 79039820 in words is "seventy-nine million, thirty-nine thousand, eight hundred twenty".