79818728 has 16 divisors (see below), whose sum is σ = 163265760. Its totient is φ = 36281200.

The previous prime is 79818727. The next prime is 79818733. The reversal of 79818728 is 82781897.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (79818727) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 453428 + ... + 453603.

It is an arithmetic number, because the mean of its divisors is an integer number (10204110).

Almost surely, 2^79818728 is an apocalyptic number.

It is an amenable number.

79818728 is an abundant number, since it is smaller than the sum of its proper divisors (83447032).

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

79818728 is a wasteful number, since it uses less digits than its factorization.

79818728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 907048 (or 907044 counting only the distinct ones).

The product of its digits is 451584, while the sum is 50.

The square root of 79818728 is about 8934.1327503009. The cubic root of 79818728 is about 430.5612429806.

The spelling of 79818728 in words is "seventy-nine million, eight hundred eighteen thousand, seven hundred twenty-eight".