79440980 has 18 divisors (see below), whose sum is σ = 166909806. Its totient is φ = 31760448.

The previous prime is 79440979. The next prime is 79441027. The reversal of 79440980 is 8904497.

It can be written as a sum of positive squares in 3 ways, for example, as 22619536 + 56821444 = 4756^2 + 7538^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 38864 + ... + 40856.

It is an arithmetic number, because the mean of its divisors is an integer number (9272767).

Almost surely, 2^79440980 is an apocalyptic number.

It is an amenable number.

79440980 is an abundant number, since it is smaller than the sum of its proper divisors (87468826).

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

79440980 is an equidigital number, since it uses as much as digits as its factorization.

79440980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3995 (or 2000 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 79440980 is about 8912.9669583142. The cubic root of 79440980 is about 429.8809477519.

The spelling of 79440980 in words is "seventy-nine million, four hundred forty thousand, nine hundred eighty".