79139784 has 32 divisors (see below), whose sum is σ = 198234720. Its totient is φ = 26328576.

The previous prime is 79139773. The next prime is 79139791. The reversal of 79139784 is 48793197.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10584 + ... + 16440.

It is an arithmetic number, because the mean of its divisors is an integer number (6194835).

Almost surely, 2^79139784 is an apocalyptic number.

It is an amenable number.

79139784 is an abundant number, since it is smaller than the sum of its proper divisors (119094936).

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

79139784 is a wasteful number, since it uses less digits than its factorization.

79139784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6429 (or 6425 counting only the distinct ones).

The product of its digits is 381024, while the sum is 48.

The square root of 79139784 is about 8896.0544063085. The cubic root of 79139784 is about 429.3369698863.

The spelling of 79139784 in words is "seventy-nine million, one hundred thirty-nine thousand, seven hundred eighty-four".