115997658 has 32 divisors (see below), whose sum is σ = 269637120. Its totient is φ = 32579760.

The previous prime is 115997633. The next prime is 115997659. The reversal of 115997658 is 856799511.

It is a super-2 number, since 2×115997658² = 26910913322969928, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 115997658.

It is not an unprimeable number, because it can be changed into a prime (115997659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20928 + ... + 25883.

It is an arithmetic number, because the mean of its divisors is an integer number (8426160).

Almost surely, 2^115997658 is an apocalyptic number.

115997658 is an abundant number, since it is smaller than the sum of its proper divisors (153639462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

115997658 is a wasteful number, since it uses less digits than its factorization.

115997658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46882.

The product of its digits is 680400, while the sum is 51.

The square root of 115997658 is about 10770.2208890997. The cubic root of 115997658 is about 487.6966139210.

The spelling of 115997658 in words is "one hundred fifteen million, nine hundred ninety-seven thousand, six hundred fifty-eight".