115809886 has 4 divisors (see below), whose sum is σ = 173714832. Its totient is φ = 57904942.

The previous prime is 115809877. The next prime is 115809887. The reversal of 115809886 is 688908511.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115809887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28952470 + ... + 28952473.

It is an arithmetic number, because the mean of its divisors is an integer number (43428708).

Almost surely, 2^115809886 is an apocalyptic number.

115809886 is a deficient number, since it is larger than the sum of its proper divisors (57904946).

115809886 is an equidigital number, since it uses as much as digits as its factorization.

115809886 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57904945.

The product of its (nonzero) digits is 138240, while the sum is 46.

The square root of 115809886 is about 10761.5001742322. The cubic root of 115809886 is about 487.4333177257.

The spelling of 115809886 in words is "one hundred fifteen million, eight hundred nine thousand, eight hundred eighty-six".