115545890 has 16 divisors (see below), whose sum is σ = 209825208. Its totient is φ = 45808896.

The previous prime is 115545887. The next prime is 115545893. The reversal of 115545890 is 98545511.

It is an interprime number because it is at equal distance from previous prime (115545887) and next prime (115545893).

It can be written as a sum of positive squares in 4 ways, for example, as 86136961 + 29408929 = 9281^2 + 5423^2 .

It is not an unprimeable number, because it can be changed into a prime (115545893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49997 + ... + 52256.

Almost surely, 2^115545890 is an apocalyptic number.

115545890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115545890 is a deficient number, since it is larger than the sum of its proper divisors (94279318).

115545890 is a wasteful number, since it uses less digits than its factorization.

115545890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102373.

The product of its (nonzero) digits is 36000, while the sum is 38.

The square root of 115545890 is about 10749.2274140982. The cubic root of 115545890 is about 487.0626575198.

The spelling of 115545890 in words is "one hundred fifteen million, five hundred forty-five thousand, eight hundred ninety".