79712020 has 48 divisors (see below), whose sum is σ = 175996800. Its totient is φ = 30267776.

The previous prime is 79711993. The next prime is 79712041. The reversal of 79712020 is 2021797.

It is a happy number.

It is a super-2 number, since 2×79712020² = 12708012264960800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79712020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67959 + ... + 69121.

It is an arithmetic number, because the mean of its divisors is an integer number (3666600).

Almost surely, 2^79712020 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 79712020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (87998400).

79712020 is an abundant number, since it is smaller than the sum of its proper divisors (96284780).

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

79712020 is a wasteful number, since it uses less digits than its factorization.

79712020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344 (or 1342 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 28.

The square root of 79712020 is about 8928.1588247522. The cubic root of 79712020 is about 430.3692879533.

The spelling of 79712020 in words is "seventy-nine million, seven hundred twelve thousand, twenty".