79928172 has 36 divisors (see below), whose sum is σ = 202402200. Its totient is φ = 26595072.

The previous prime is 79928161. The next prime is 79928201. The reversal of 79928172 is 27182997.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-3 number, since 3×79928172³ (a number of 25 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22579 + ... + 25877.

Almost surely, 2^79928172 is an apocalyptic number.

It is an amenable number.

79928172 is an abundant number, since it is smaller than the sum of its proper divisors (122474028).

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

79928172 is a wasteful number, since it uses less digits than its factorization.

79928172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3982 (or 3977 counting only the distinct ones).

The product of its digits is 127008, while the sum is 45.

The square root of 79928172 is about 8940.2557010412. The cubic root of 79928172 is about 430.7579421133.

The spelling of 79928172 in words is "seventy-nine million, nine hundred twenty-eight thousand, one hundred seventy-two".