115638994 has 4 divisors (see below), whose sum is σ = 173458494. Its totient is φ = 57819496.

The previous prime is 115638989. The next prime is 115639001. The reversal of 115638994 is 499836511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 499836511 = 167 ⋅2993033.

It can be written as a sum of positive squares in only one way, i.e., 65044225 + 50594769 = 8065^2 + 7113^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28909747 + ... + 28909750.

Almost surely, 2^115638994 is an apocalyptic number.

115638994 is a deficient number, since it is larger than the sum of its proper divisors (57819500).

115638994 is an equidigital number, since it uses as much as digits as its factorization.

115638994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57819499.

The product of its digits is 233280, while the sum is 46.

The square root of 115638994 is about 10753.5572718984. The cubic root of 115638994 is about 487.1934433837.

The spelling of 115638994 in words is "one hundred fifteen million, six hundred thirty-eight thousand, nine hundred ninety-four".