79647856 has 40 divisors (see below), whose sum is σ = 164011824. Its totient is φ = 37340160.

The previous prime is 79647853. The next prime is 79647857. The reversal of 79647856 is 65874697.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79647853) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120166 + ... + 120826.

Almost surely, 2^79647856 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 79647856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82005912).

79647856 is an abundant number, since it is smaller than the sum of its proper divisors (84363968).

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

79647856 is a wasteful number, since it uses less digits than its factorization.

79647856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1129 (or 1123 counting only the distinct ones).

The product of its digits is 2540160, while the sum is 52.

The square root of 79647856 is about 8924.5647512918. The cubic root of 79647856 is about 430.2537820458.

The spelling of 79647856 in words is "seventy-nine million, six hundred forty-seven thousand, eight hundred fifty-six".