79890918 has 16 divisors (see below), whose sum is σ = 164100720. Its totient is φ = 25910496.

The previous prime is 79890901. The next prime is 79890959. The reversal of 79890918 is 81909897.

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, 179713 + ... + 180156.

It is an arithmetic number, because the mean of its divisors is an integer number (10256295).

Almost surely, 2^79890918 is an apocalyptic number.

79890918 is an abundant number, since it is smaller than the sum of its proper divisors (84209802).

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

79890918 is a wasteful number, since it uses less digits than its factorization.

79890918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359911.

The product of its (nonzero) digits is 326592, while the sum is 51.

The square root of 79890918 is about 8938.1719607535. The cubic root of 79890918 is about 430.6910072232.

It can be divided in two parts, 79890 and 918, that added together give a palindrome (80808).

The spelling of 79890918 in words is "seventy-nine million, eight hundred ninety thousand, nine hundred eighteen".