79999644 has 24 divisors (see below), whose sum is σ = 186820480. Its totient is φ = 26644464.

The previous prime is 79999627. The next prime is 79999657. The reversal of 79999644 is 44699997.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19527 + ... + 23265.

Almost surely, 2^79999644 is an apocalyptic number.

It is an amenable number.

79999644 is an abundant number, since it is smaller than the sum of its proper divisors (106820836).

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

79999644 is a wasteful number, since it uses less digits than its factorization.

79999644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5529 (or 5527 counting only the distinct ones).

The product of its digits is 4408992, while the sum is 57.

The square root of 79999644 is about 8944.2520089720. The cubic root of 79999644 is about 430.8862988565.

The spelling of 79999644 in words is "seventy-nine million, nine hundred ninety-nine thousand, six hundred forty-four".