115635978 has 16 divisors (see below), whose sum is σ = 256968960. Its totient is φ = 38545308.

The previous prime is 115635967. The next prime is 115635979. The reversal of 115635978 is 879536511.

It is a happy number.

115635978 is a `hidden beast` number, since 1 + 1 + 5 + 635 + 9 + 7 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (115635979) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1070650 + ... + 1070757.

It is an arithmetic number, because the mean of its divisors is an integer number (16060560).

Almost surely, 2^115635978 is an apocalyptic number.

115635978 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

115635978 is an abundant number, since it is smaller than the sum of its proper divisors (141332982).

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

115635978 is a wasteful number, since it uses less digits than its factorization.

115635978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2141418 (or 2141412 counting only the distinct ones).

The product of its digits is 226800, while the sum is 45.

The square root of 115635978 is about 10753.4170383186. The cubic root of 115635978 is about 487.1892078223.

The spelling of 115635978 in words is "one hundred fifteen million, six hundred thirty-five thousand, nine hundred seventy-eight".