79921288 has 16 divisors (see below), whose sum is σ = 151537500. Its totient is φ = 39511296.

The previous prime is 79921273. The next prime is 79921327. The reversal of 79921288 is 88212997.

It can be written as a sum of positive squares in 2 ways, for example, as 79245604 + 675684 = 8902^2 + 822^2 .

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, 55413 + ... + 56836.

Almost surely, 2^79921288 is an apocalyptic number.

It is an amenable number.

79921288 is a deficient number, since it is larger than the sum of its proper divisors (71616212).

79921288 is a wasteful number, since it uses less digits than its factorization.

79921288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112344 (or 112340 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

The square root of 79921288 is about 8939.8706925772. The cubic root of 79921288 is about 430.7455750811.

The spelling of 79921288 in words is "seventy-nine million, nine hundred twenty-one thousand, two hundred eighty-eight".