115978185 has 24 divisors (see below), whose sum is σ = 211610880. Its totient is φ = 58599072.

The previous prime is 115978183. The next prime is 115978193. The reversal of 115978185 is 581879511.

It is not a de Polignac number, because 115978185 - 2¹ = 115978183 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 115978185.

It is not an unprimeable number, because it can be changed into a prime (115978183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 66969 + ... + 68678.

It is an arithmetic number, because the mean of its divisors is an integer number (8817120).

Almost surely, 2^115978185 is an apocalyptic number.

115978185 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

115978185 is a deficient number, since it is larger than the sum of its proper divisors (95632695).

115978185 is a wasteful number, since it uses less digits than its factorization.

115978185 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135677 (or 135674 counting only the distinct ones).

The product of its digits is 100800, while the sum is 45.

The square root of 115978185 is about 10769.3168307001. The cubic root of 115978185 is about 487.6693218538.

The spelling of 115978185 in words is "one hundred fifteen million, nine hundred seventy-eight thousand, one hundred eighty-five".