79887924 has 96 divisors (see below), whose sum is σ = 223776000. Its totient is φ = 24571008.

The previous prime is 79887923. The next prime is 79887931. The reversal of 79887924 is 42978897.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79887923) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 71482 + ... + 72590.

It is an arithmetic number, because the mean of its divisors is an integer number (2331000).

Almost surely, 2^79887924 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 79887924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111888000).

79887924 is an abundant number, since it is smaller than the sum of its proper divisors (143888076).

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

79887924 is a wasteful number, since it uses less digits than its factorization.

79887924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174 (or 1166 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 54.

The square root of 79887924 is about 8938.0044752730. The cubic root of 79887924 is about 430.6856269496.

The spelling of 79887924 in words is "seventy-nine million, eight hundred eighty-seven thousand, nine hundred twenty-four".