79874447828 has 72 divisors (see below), whose sum is σ = 164349057600. Its totient is φ = 33864711552.

The previous prime is 79874447773. The next prime is 79874447867. The reversal of 79874447828 is 82874447897.

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, 32481263 + ... + 32483721.

It is an arithmetic number, because the mean of its divisors is an integer number (2282625800).

Almost surely, 2^79874447828 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 79874447828, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82174528800).

79874447828 is an abundant number, since it is smaller than the sum of its proper divisors (84474609772).

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

79874447828 is a wasteful number, since it uses less digits than its factorization.

79874447828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4189 (or 4180 counting only the distinct ones).

The product of its digits is 202309632, while the sum is 68.

The spelling of 79874447828 in words is "seventy-nine billion, eight hundred seventy-four million, four hundred forty-seven thousand, eight hundred twenty-eight".