79139984 has 40 divisors (see below), whose sum is σ = 191172288. Its totient is φ = 30833280.

The previous prime is 79139917. The next prime is 79139989. The reversal of 79139984 is 48993197.

It is not an unprimeable number, because it can be changed into a prime (79139989) 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, 30887 + ... + 33350.

Almost surely, 2^79139984 is an apocalyptic number.

It is an amenable number.

79139984 is an abundant number, since it is smaller than the sum of its proper divisors (112032304).

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

79139984 is a wasteful number, since it uses less digits than its factorization.

79139984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64263 (or 64257 counting only the distinct ones).

The product of its digits is 489888, while the sum is 50.

The square root of 79139984 is about 8896.0656472398. The cubic root of 79139984 is about 429.3373315558.

The spelling of 79139984 in words is "seventy-nine million, one hundred thirty-nine thousand, nine hundred eighty-four".