79440918 has 16 divisors (see below), whose sum is σ = 164360880. Its totient is φ = 25567136.

The previous prime is 79440917. The next prime is 79440929. The reversal of 79440918 is 81904497.

It is a self number, because there is not a number n which added to its sum of digits gives 79440918.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79440917) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228105 + ... + 228452.

It is an arithmetic number, because the mean of its divisors is an integer number (10272555).

Almost surely, 2^79440918 is an apocalyptic number.

79440918 is an abundant number, since it is smaller than the sum of its proper divisors (84919962).

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

79440918 is a wasteful number, since it uses less digits than its factorization.

79440918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456591.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 79440918 is about 8912.9634802348. The cubic root of 79440918 is about 429.8808359178.

The spelling of 79440918 in words is "seventy-nine million, four hundred forty thousand, nine hundred eighteen".