79720416 has 48 divisors (see below), whose sum is σ = 232520400. Its totient is φ = 26573184.

The previous prime is 79720397. The next prime is 79720423. The reversal of 79720416 is 61402797.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 45271 + ... + 46998.

It is an arithmetic number, because the mean of its divisors is an integer number (4844175).

Almost surely, 2^79720416 is an apocalyptic number.

It is an amenable number.

79720416 is an abundant number, since it is smaller than the sum of its proper divisors (152799984).

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

79720416 is a wasteful number, since it uses less digits than its factorization.

79720416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92288 (or 92274 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 79720416 is about 8928.6290101000. The cubic root of 79720416 is about 430.3843975678.

The spelling of 79720416 in words is "seventy-nine million, seven hundred twenty thousand, four hundred sixteen".