115685889 has 32 divisors (see below), whose sum is σ = 177999360. Its totient is φ = 66096000.

The previous prime is 115685881. The next prime is 115685891. The reversal of 115685889 is 988586511.

It is not a de Polignac number, because 115685889 - 2³ = 115685881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115685881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192189 + ... + 192789.

It is an arithmetic number, because the mean of its divisors is an integer number (5562480).

Almost surely, 2^115685889 is an apocalyptic number.

115685889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

115685889 is a deficient number, since it is larger than the sum of its proper divisors (62313471).

115685889 is a wasteful number, since it uses less digits than its factorization.

115685889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941.

The product of its digits is 691200, while the sum is 51.

The square root of 115685889 is about 10755.7374921481. The cubic root of 115685889 is about 487.2592915550.

The spelling of 115685889 in words is "one hundred fifteen million, six hundred eighty-five thousand, eight hundred eighty-nine".