79726720 has 64 divisors (see below), whose sum is σ = 191678400. Its totient is φ = 31710208.

The previous prime is 79726709. The next prime is 79726733. The reversal of 79726720 is 2762797.

It is a tau number, because it is divible by the number of its divisors (64).

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

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, 221901 + ... + 222259.

It is an arithmetic number, because the mean of its divisors is an integer number (2994975).

Almost surely, 2^79726720 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 79726720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95839200).

79726720 is an abundant number, since it is smaller than the sum of its proper divisors (111951680).

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

79726720 is a wasteful number, since it uses less digits than its factorization.

79726720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 725 (or 713 counting only the distinct ones).

The product of its (nonzero) digits is 74088, while the sum is 40.

The square root of 79726720 is about 8928.9820248447. The cubic root of 79726720 is about 430.3957416788.

The spelling of 79726720 in words is "seventy-nine million, seven hundred twenty-six thousand, seven hundred twenty".