115891918 has 8 divisors (see below), whose sum is σ = 178536312. Its totient is φ = 56379816.

The previous prime is 115891913. The next prime is 115891921. The reversal of 115891918 is 819198511.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115891913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 782980 + ... + 783127.

It is an arithmetic number, because the mean of its divisors is an integer number (22317039).

Almost surely, 2^115891918 is an apocalyptic number.

115891918 is a deficient number, since it is larger than the sum of its proper divisors (62644394).

115891918 is a wasteful number, since it uses less digits than its factorization.

115891918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1566146.

The product of its digits is 25920, while the sum is 43.

The square root of 115891918 is about 10765.3108640670. The cubic root of 115891918 is about 487.5483789814.

The spelling of 115891918 in words is "one hundred fifteen million, eight hundred ninety-one thousand, nine hundred eighteen".