115699920 has 160 divisors (see below), whose sum is σ = 416997120. Its totient is φ = 25989120.

The previous prime is 115699907. The next prime is 115699931. The reversal of 115699920 is 29996511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 101916 + ... + 103044.

It is an arithmetic number, because the mean of its divisors is an integer number (2606232).

Almost surely, 2^115699920 is an apocalyptic number.

115699920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 115699920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208498560).

115699920 is an abundant number, since it is smaller than the sum of its proper divisors (301297200).

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

115699920 is a wasteful number, since it uses less digits than its factorization.

115699920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1213 (or 1207 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 42.

The square root of 115699920 is about 10756.3897289007. The cubic root of 115699920 is about 487.2789898916.

The spelling of 115699920 in words is "one hundred fifteen million, six hundred ninety-nine thousand, nine hundred twenty".