79815216 has 80 divisors (see below), whose sum is σ = 228117344. Its totient is φ = 23887872.

The previous prime is 79815199. The next prime is 79815223. The reversal of 79815216 is 61251897.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 21360 + ... + 24816.

Almost surely, 2^79815216 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 79815216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (114058672).

79815216 is an abundant number, since it is smaller than the sum of its proper divisors (148302128).

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

79815216 is a wasteful number, since it uses less digits than its factorization.

79815216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3518 (or 3512 counting only the distinct ones).

The product of its digits is 30240, while the sum is 39.

The square root of 79815216 is about 8933.9361985633. The cubic root of 79815216 is about 430.5549280330.

The spelling of 79815216 in words is "seventy-nine million, eight hundred fifteen thousand, two hundred sixteen".