115906138 has 8 divisors (see below), whose sum is σ = 174352788. Its totient is φ = 57788544.

The previous prime is 115906129. The next prime is 115906201. The reversal of 115906138 is 831609511.

It can be written as a sum of positive squares in 2 ways, for example, as 109265209 + 6640929 = 10453^2 + 2577^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81381 + ... + 82792.

Almost surely, 2^115906138 is an apocalyptic number.

115906138 is a deficient number, since it is larger than the sum of its proper divisors (58446650).

115906138 is a wasteful number, since it uses less digits than its factorization.

115906138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164528.

The product of its (nonzero) digits is 6480, while the sum is 34.

The square root of 115906138 is about 10765.9712984942. The cubic root of 115906138 is about 487.5683189810.

The spelling of 115906138 in words is "one hundred fifteen million, nine hundred six thousand, one hundred thirty-eight".