79999872 has 32 divisors (see below), whose sum is σ = 212500680. Its totient is φ = 26666496.

The previous prime is 79999849. The next prime is 79999879. The reversal of 79999872 is 27899997.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79999879) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103783 + ... + 104550.

Almost surely, 2^79999872 is an apocalyptic number.

It is an amenable number.

79999872 is an abundant number, since it is smaller than the sum of its proper divisors (132500808).

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

79999872 is a wasteful number, since it uses less digits than its factorization.

79999872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208350 (or 208338 counting only the distinct ones).

The product of its digits is 5143824, while the sum is 60.

The square root of 79999872 is about 8944.2647545788. The cubic root of 79999872 is about 430.8867081999.

It can be divided in two parts, 7999 and 9872, that added together give a palindrome (17871).

The spelling of 79999872 in words is "seventy-nine million, nine hundred ninety-nine thousand, eight hundred seventy-two".