115638 has 8 divisors (see below), whose sum is σ = 231288. Its totient is φ = 38544.

The previous prime is 115637. The next prime is 115657. The reversal of 115638 is 836511.

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

115638 is an admirable number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115631) 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, 9631 + ... + 9642.

It is an arithmetic number, because the mean of its divisors is an integer number (28911).

2¹¹⁵⁶³⁸ is an apocalyptic number.

115638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

115638 is a wasteful number, since it uses less digits than its factorization.

115638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19278.

The product of its digits is 720, while the sum is 24.

The square root of 115638 is about 340.0558777613. The cubic root of 115638 is about 48.7192047454.

The spelling of 115638 in words is "one hundred fifteen thousand, six hundred thirty-eight".