79989960 has 64 divisors (see below), whose sum is σ = 243576000. Its totient is φ = 21010176.

The previous prime is 79989941. The next prime is 79989961. The reversal of 79989960 is 6998997.

It is a self number, because there is not a number n which added to its sum of digits gives 79989960.

It is not an unprimeable number, because it can be changed into a prime (79989961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3066 + ... + 13014.

It is an arithmetic number, because the mean of its divisors is an integer number (3805875).

Almost surely, 2^79989960 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 79989960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121788000).

79989960 is an abundant number, since it is smaller than the sum of its proper divisors (163586040).

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

79989960 is a wasteful number, since it uses less digits than its factorization.

79989960 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10030 (or 10026 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 57.

The square root of 79989960 is about 8943.7106393264. The cubic root of 79989960 is about 430.8689118154.

The spelling of 79989960 in words is "seventy-nine million, nine hundred eighty-nine thousand, nine hundred sixty".