79178320 has 80 divisors (see below), whose sum is σ = 208736640. Its totient is φ = 27689472.

The previous prime is 79178317. The next prime is 79178347. The reversal of 79178320 is 2387197.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 79178320.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17757 + ... + 21763.

It is an arithmetic number, because the mean of its divisors is an integer number (2609208).

Almost surely, 2^79178320 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79178320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104368320).

79178320 is an abundant number, since it is smaller than the sum of its proper divisors (129558320).

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

79178320 is a wasteful number, since it uses less digits than its factorization.

79178320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4052 (or 4046 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 79178320 is about 8898.2200467284. The cubic root of 79178320 is about 429.4066451029.

The spelling of 79178320 in words is "seventy-nine million, one hundred seventy-eight thousand, three hundred twenty".