79715920 has 40 divisors (see below), whose sum is σ = 186595200. Its totient is φ = 31670400.

The previous prime is 79715899. The next prime is 79715957. The reversal of 79715920 is 2951797.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8781 + ... + 15379.

It is an arithmetic number, because the mean of its divisors is an integer number (4664880).

Almost surely, 2^79715920 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 79715920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93297600).

79715920 is an abundant number, since it is smaller than the sum of its proper divisors (106879280).

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

79715920 is a wasteful number, since it uses less digits than its factorization.

79715920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6763 (or 6757 counting only the distinct ones).

The product of its (nonzero) digits is 39690, while the sum is 40.

The square root of 79715920 is about 8928.3772321738. The cubic root of 79715920 is about 430.3763066056.

The spelling of 79715920 in words is "seventy-nine million, seven hundred fifteen thousand, nine hundred twenty".