79720 has 16 divisors (see below), whose sum is σ = 179460. Its totient is φ = 31872.

The previous prime is 79699. The next prime is 79757. The reversal of 79720 is 2797.

It can be written as a sum of positive squares in 2 ways, for example, as 79524 + 196 = 282^2 + 14^2 .

It is an unprimeable number.

79720 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 957 + ... + 1036.

2⁷⁹⁷²⁰ is an apocalyptic number.

It is an amenable number.

79720 is an abundant number, since it is smaller than the sum of its proper divisors (99740).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89730).

79720 is a wasteful number, since it uses less digits than its factorization.

79720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2004 (or 2000 counting only the distinct ones).

The product of its (nonzero) digits is 882, while the sum is 25.

The square root of 79720 is about 282.3473038653. The cubic root of 79720 is about 43.0383648951.

The spelling of 79720 in words is "seventy-nine thousand, seven hundred twenty".