115561388 has 12 divisors (see below), whose sum is σ = 203777112. Its totient is φ = 57339360.

The previous prime is 115561373. The next prime is 115561417. The reversal of 115561388 is 883165511.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109745 + ... + 110792.

It is an arithmetic number, because the mean of its divisors is an integer number (16981426).

Almost surely, 2^115561388 is an apocalyptic number.

It is an amenable number.

115561388 is a deficient number, since it is larger than the sum of its proper divisors (88215724).

115561388 is a wasteful number, since it uses less digits than its factorization.

115561388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220672 (or 220670 counting only the distinct ones).

The product of its digits is 28800, while the sum is 38.

The square root of 115561388 is about 10749.9482789453. The cubic root of 115561388 is about 487.0844328785.

The spelling of 115561388 in words is "one hundred fifteen million, five hundred sixty-one thousand, three hundred eighty-eight".