79987800 has 96 divisors (see below), whose sum is σ = 256568400. Its totient is φ = 20590080.

The previous prime is 79987793. The next prime is 79987837. The reversal of 79987800 is 878997.

It is a self number, because there is not a number n which added to its sum of digits gives 79987800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 15102 + ... + 19698.

Almost surely, 2^79987800 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 79987800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (128284200).

79987800 is an abundant number, since it is smaller than the sum of its proper divisors (176580600).

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

79987800 is a wasteful number, since it uses less digits than its factorization.

79987800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4645 (or 4636 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 48.

The square root of 79987800 is about 8943.5898832628. The cubic root of 79987800 is about 430.8650334735.

The spelling of 79987800 in words is "seventy-nine million, nine hundred eighty-seven thousand, eight hundred".