115799890 has 16 divisors (see below), whose sum is σ = 211973760. Its totient is φ = 45534640.

The previous prime is 115799881. The next prime is 115799909. The reversal of 115799890 is 98997511.

It is a happy number.

It is a super-2 number, since 2×115799890² = 26819229048024200, which contains 22 as substring.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 97546 + ... + 98725.

It is an arithmetic number, because the mean of its divisors is an integer number (13248360).

Almost surely, 2^115799890 is an apocalyptic number.

115799890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115799890 is a deficient number, since it is larger than the sum of its proper divisors (96173870).

115799890 is a wasteful number, since it uses less digits than its factorization.

115799890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196337.

The product of its (nonzero) digits is 204120, while the sum is 49.

The square root of 115799890 is about 10761.0357308207. The cubic root of 115799890 is about 487.4192932361.

The spelling of 115799890 in words is "one hundred fifteen million, seven hundred ninety-nine thousand, eight hundred ninety".