79728156 has 72 divisors (see below), whose sum is σ = 209664000. Its totient is φ = 25518240.

The previous prime is 79728139. The next prime is 79728179. The reversal of 79728156 is 65182797.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 221905 + ... + 222263.

It is an arithmetic number, because the mean of its divisors is an integer number (2912000).

Almost surely, 2^79728156 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 79728156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104832000).

79728156 is an abundant number, since it is smaller than the sum of its proper divisors (129935844).

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

79728156 is a wasteful number, since it uses less digits than its factorization.

79728156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599 (or 594 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 79728156 is about 8929.0624367847. The cubic root of 79728156 is about 430.3983256915.

The spelling of 79728156 in words is "seventy-nine million, seven hundred twenty-eight thousand, one hundred fifty-six".