79999800 has 96 divisors (see below), whose sum is σ = 249924480. Its totient is φ = 21168000.

The previous prime is 79999789. The next prime is 79999813. The reversal of 79999800 is 899997.

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, 90159 + ... + 91041.

It is an arithmetic number, because the mean of its divisors is an integer number (2603380).

Almost surely, 2^79999800 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 79999800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (124962240).

79999800 is an abundant number, since it is smaller than the sum of its proper divisors (169924680).

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

79999800 is a wasteful number, since it uses less digits than its factorization.

79999800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1053 (or 1044 counting only the distinct ones).

The product of its (nonzero) digits is 367416, while the sum is 51.

The square root of 79999800 is about 8944.2607296523. The cubic root of 79999800 is about 430.8865789336.

The spelling of 79999800 in words is "seventy-nine million, nine hundred ninety-nine thousand, eight hundred".