115866189 has 24 divisors (see below), whose sum is σ = 173298944. Its totient is φ = 74520000.

The previous prime is 115866167. The next prime is 115866193. The reversal of 115866189 is 981668511.

115866189 is a `hidden beast` number, since 1 + 1 + 586 + 61 + 8 + 9 = 666.

It is not a de Polignac number, because 115866189 - 2²⁰ = 114817613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115866119) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 167334 + ... + 168024.

Almost surely, 2^115866189 is an apocalyptic number.

It is an amenable number.

115866189 is a deficient number, since it is larger than the sum of its proper divisors (57432755).

115866189 is a wasteful number, since it uses less digits than its factorization.

115866189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329 (or 1326 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 115866189 is about 10764.1158020527. The cubic root of 115866189 is about 487.5122963368.

The spelling of 115866189 in words is "one hundred fifteen million, eight hundred sixty-six thousand, one hundred eighty-nine".