115538978 has 8 divisors (see below), whose sum is σ = 173405340. Its totient is φ = 57737200.

The previous prime is 115538977. The next prime is 115538989. The reversal of 115538978 is 879835511.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 113145769 + 2393209 = 10637^2 + 1547^2 .

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

It is not an unprimeable number, because it can be changed into a prime (115538971) 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, 11393 + ... + 18996.

Almost surely, 2^115538978 is an apocalyptic number.

115538978 is a deficient number, since it is larger than the sum of its proper divisors (57866362).

115538978 is a wasteful number, since it uses less digits than its factorization.

115538978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32292.

The product of its digits is 302400, while the sum is 47.

The square root of 115538978 is about 10748.9058978112. The cubic root of 115538978 is about 487.0529452337.

The spelling of 115538978 in words is "one hundred fifteen million, five hundred thirty-eight thousand, nine hundred seventy-eight".