115887861 has 32 divisors (see below), whose sum is σ = 184809600. Its totient is φ = 71504640.

The previous prime is 115887851. The next prime is 115887883. The reversal of 115887861 is 168788511.

115887861 is a `hidden beast` number, since 1 + 1 + 588 + 7 + 8 + 61 = 666.

It is not a de Polignac number, because 115887861 - 2¹⁷ = 115756789 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115887841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25930 + ... + 30068.

It is an arithmetic number, because the mean of its divisors is an integer number (5775300).

Almost surely, 2^115887861 is an apocalyptic number.

It is an amenable number.

115887861 is a deficient number, since it is larger than the sum of its proper divisors (68921739).

115887861 is a wasteful number, since it uses less digits than its factorization.

115887861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4226 (or 4220 counting only the distinct ones).

The product of its digits is 107520, while the sum is 45.

The square root of 115887861 is about 10765.1224331171. The cubic root of 115887861 is about 487.5426897527.

The spelling of 115887861 in words is "one hundred fifteen million, eight hundred eighty-seven thousand, eight hundred sixty-one".