79871568 has 120 divisors (see below), whose sum is σ = 248510880. Its totient is φ = 22014720.

The previous prime is 79871551. The next prime is 79871569. The reversal of 79871568 is 86517897.

It is a self number, because there is not a number n which added to its sum of digits gives 79871568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79871569) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 67623 + ... + 68793.

It is an arithmetic number, because the mean of its divisors is an integer number (2070924).

Almost surely, 2^79871568 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 79871568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124255440).

79871568 is an abundant number, since it is smaller than the sum of its proper divisors (168639312).

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

79871568 is a wasteful number, since it uses less digits than its factorization.

79871568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1225 (or 1212 counting only the distinct ones).

The product of its digits is 846720, while the sum is 51.

The square root of 79871568 is about 8937.0894591024. The cubic root of 79871568 is about 430.6562325407.

The spelling of 79871568 in words is "seventy-nine million, eight hundred seventy-one thousand, five hundred sixty-eight".