117918618 has 32 divisors (see below), whose sum is σ = 239199360. Its totient is φ = 38750400.

The previous prime is 117918607. The next prime is 117918679. The reversal of 117918618 is 816819711.

It is a self number, because there is not a number n which added to its sum of digits gives 117918618.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 141828 + ... + 142656.

It is an arithmetic number, because the mean of its divisors is an integer number (7474980).

Almost surely, 2^117918618 is an apocalyptic number.

117918618 is an abundant number, since it is smaller than the sum of its proper divisors (121280742).

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

117918618 is a wasteful number, since it uses less digits than its factorization.

117918618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142.

The product of its digits is 24192, while the sum is 42.

The square root of 117918618 is about 10859.0339349318. The cubic root of 117918618 is about 490.3740279040.

The spelling of 117918618 in words is "one hundred seventeen million, nine hundred eighteen thousand, six hundred eighteen".