79871428 has 36 divisors (see below), whose sum is σ = 172986240. Its totient is φ = 31595616.

The previous prime is 79871413. The next prime is 79871447. The reversal of 79871428 is 82417897.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3708 + ... + 13171.

Almost surely, 2^79871428 is an apocalyptic number.

It is an amenable number.

79871428 is an abundant number, since it is smaller than the sum of its proper divisors (93114812).

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

79871428 is a wasteful number, since it uses less digits than its factorization.

79871428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16916 (or 16901 counting only the distinct ones).

The product of its digits is 225792, while the sum is 46.

The square root of 79871428 is about 8937.0816265714. The cubic root of 79871428 is about 430.6559809205.

The spelling of 79871428 in words is "seventy-nine million, eight hundred seventy-one thousand, four hundred twenty-eight".