79138664 has 32 divisors (see below), whose sum is σ = 162375840. Its totient is φ = 35860800.

The previous prime is 79138649. The next prime is 79138727. The reversal of 79138664 is 46683197.

It is a Harshad number since it is a multiple of its sum of digits (44).

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, 31619 + ... + 34029.

It is an arithmetic number, because the mean of its divisors is an integer number (5074245).

Almost surely, 2^79138664 is an apocalyptic number.

It is an amenable number.

79138664 is an abundant number, since it is smaller than the sum of its proper divisors (83237176).

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

79138664 is a wasteful number, since it uses less digits than its factorization.

79138664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2801 (or 2797 counting only the distinct ones).

The product of its digits is 217728, while the sum is 44.

The square root of 79138664 is about 8895.9914568304. The cubic root of 79138664 is about 429.3349445263.

The spelling of 79138664 in words is "seventy-nine million, one hundred thirty-eight thousand, six hundred sixty-four".