115998399 has 40 divisors (see below), whose sum is σ = 191054160. Its totient is φ = 69552000.

The previous prime is 115998359. The next prime is 115998431. The reversal of 115998399 is 993899511.

115998399 is a `hidden beast` number, since 11 + 599 + 8 + 39 + 9 = 666.

It is not a de Polignac number, because 115998399 - 2⁹ = 115997887 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (115998329) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 89347 + ... + 90635.

It is an arithmetic number, because the mean of its divisors is an integer number (4776354).

Almost surely, 2^115998399 is an apocalyptic number.

115998399 is a deficient number, since it is larger than the sum of its proper divisors (75055761).

115998399 is a wasteful number, since it uses less digits than its factorization.

115998399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1413 (or 1404 counting only the distinct ones).

The product of its digits is 787320, while the sum is 54.

The square root of 115998399 is about 10770.2552894534. The cubic root of 115998399 is about 487.6976523972.

The spelling of 115998399 in words is "one hundred fifteen million, nine hundred ninety-eight thousand, three hundred ninety-nine".