79981884 has 48 divisors (see below), whose sum is σ = 214519200. Its totient is φ = 25740288.

The previous prime is 79981883. The next prime is 79981907. The reversal of 79981884 is 48818997.

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

It is a self number, because there is not a number n which added to its sum of digits gives 79981884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79981883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9637 + ... + 15900.

It is an arithmetic number, because the mean of its divisors is an integer number (4469150).

Almost surely, 2^79981884 is an apocalyptic number.

It is an amenable number.

79981884 is an abundant number, since it is smaller than the sum of its proper divisors (134537316).

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

79981884 is a wasteful number, since it uses less digits than its factorization.

79981884 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25579 (or 25571 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 54.

The square root of 79981884 is about 8943.2591374733. The cubic root of 79981884 is about 430.8544107686.

The spelling of 79981884 in words is "seventy-nine million, nine hundred eighty-one thousand, eight hundred eighty-four".