115992 has 40 divisors (see below), whose sum is σ = 326700. Its totient is φ = 38448.

The previous prime is 115987. The next prime is 116009. The reversal of 115992 is 299511.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a plaindrome in base 15.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 559 + ... + 737.

2¹¹⁵⁹⁹² is an apocalyptic number.

115992 is a gapful number since it is divisible by the number (12) 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 115992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (163350).

115992 is an abundant number, since it is smaller than the sum of its proper divisors (210708).

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

115992 is a wasteful number, since it uses less digits than its factorization.

115992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197 (or 184 counting only the distinct ones).

The product of its digits is 810, while the sum is 27.

The square root of 115992 is about 340.5759827116. The cubic root of 115992 is about 48.7688684358.

The spelling of 115992 in words is "one hundred fifteen thousand, nine hundred ninety-two".