115887866 has 4 divisors (see below), whose sum is σ = 173831802. Its totient is φ = 57943932.

The previous prime is 115887851. The next prime is 115887883. The reversal of 115887866 is 668788511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 668788511 = 163 ⋅4102997.

It can be written as a sum of positive squares in only one way, i.e., 102718225 + 13169641 = 10135^2 + 3629^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28971965 + ... + 28971968.

Almost surely, 2^115887866 is an apocalyptic number.

115887866 is a deficient number, since it is larger than the sum of its proper divisors (57943936).

115887866 is an equidigital number, since it uses as much as digits as its factorization.

115887866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57943935.

The product of its digits is 645120, while the sum is 50.

The square root of 115887866 is about 10765.1226653485. The cubic root of 115887866 is about 487.5426967644.

The spelling of 115887866 in words is "one hundred fifteen million, eight hundred eighty-seven thousand, eight hundred sixty-six".