79911620 has 12 divisors (see below), whose sum is σ = 167814444. Its totient is φ = 31964640.

The previous prime is 79911613. The next prime is 79911631. The reversal of 79911620 is 2611997.

It can be written as a sum of positive squares in 2 ways, for example, as 33016516 + 46895104 = 5746^2 + 6848^2 .

It is a super-2 number, since 2×79911620² = 12771734022048800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1997771 + ... + 1997810.

It is an arithmetic number, because the mean of its divisors is an integer number (13984537).

Almost surely, 2^79911620 is an apocalyptic number.

It is an amenable number.

79911620 is an abundant number, since it is smaller than the sum of its proper divisors (87902824).

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

79911620 is a wasteful number, since it uses less digits than its factorization.

79911620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3995590 (or 3995588 counting only the distinct ones).

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 79911620 is about 8939.3299525188. The cubic root of 79911620 is about 430.7282054238.

The spelling of 79911620 in words is "seventy-nine million, nine hundred eleven thousand, six hundred twenty".