115978180 has 24 divisors (see below), whose sum is σ = 245793240. Its totient is φ = 45964800.

The previous prime is 115978171. The next prime is 115978183. The reversal of 115978180 is 81879511.

It can be written as a sum of positive squares in 4 ways, for example, as 34292736 + 81685444 = 5856^2 + 9038^2 .

It is a super-2 number, since 2×115978180² = 26901876472224800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (115978183) 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, 24421 + ... + 28780.

It is an arithmetic number, because the mean of its divisors is an integer number (10241385).

Almost surely, 2^115978180 is an apocalyptic number.

115978180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

115978180 is an abundant number, since it is smaller than the sum of its proper divisors (129815060).

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

115978180 is a wasteful number, since it uses less digits than its factorization.

115978180 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53319 (or 53317 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 40.

The square root of 115978180 is about 10769.3165985591. The cubic root of 115978180 is about 487.6693148457.

The spelling of 115978180 in words is "one hundred fifteen million, nine hundred seventy-eight thousand, one hundred eighty".