79828728 has 128 divisors (see below), whose sum is σ = 243648000. Its totient is φ = 21288960.

The previous prime is 79828669. The next prime is 79828733. The reversal of 79828728 is 82782897.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 283948 + ... + 284228.

It is an arithmetic number, because the mean of its divisors is an integer number (1903500).

Almost surely, 2^79828728 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 79828728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121824000).

79828728 is an abundant number, since it is smaller than the sum of its proper divisors (163819272).

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

79828728 is a wasteful number, since it uses less digits than its factorization.

79828728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 401 counting only the distinct ones).

The product of its digits is 903168, while the sum is 51.

The square root of 79828728 is about 8934.6923841842. The cubic root of 79828728 is about 430.5792230243.

It can be divided in two parts, 798 and 28728, that multiplied together give a square (22924944 = 4788²).

The spelling of 79828728 in words is "seventy-nine million, eight hundred twenty-eight thousand, seven hundred twenty-eight".