115555878 has 24 divisors (see below), whose sum is σ = 256195368. Its totient is φ = 37622592.

The previous prime is 115555877. The next prime is 115555889. The reversal of 115555878 is 878555511.

115555878 is a `hidden beast` number, since 1 + 15 + 55 + 587 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115555873) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 73875 + ... + 75422.

It is an arithmetic number, because the mean of its divisors is an integer number (10674807).

Almost surely, 2^115555878 is an apocalyptic number.

115555878 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

115555878 is an abundant number, since it is smaller than the sum of its proper divisors (140639490).

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

115555878 is a wasteful number, since it uses less digits than its factorization.

115555878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149348 (or 149345 counting only the distinct ones).

The product of its digits is 280000, while the sum is 45.

The square root of 115555878 is about 10749.6919955876. The cubic root of 115555878 is about 487.0766913138.

The spelling of 115555878 in words is "one hundred fifteen million, five hundred fifty-five thousand, eight hundred seventy-eight".