115990 has 16 divisors (see below), whose sum is σ = 238752. Its totient is φ = 39744.

The previous prime is 115987. The next prime is 116009. The reversal of 115990 is 99511.

115990 is nontrivially palindromic in base 3.

It is a plaindrome in base 15.

It is a nialpdrome in base 7.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 759 + ... + 898.

It is an arithmetic number, because the mean of its divisors is an integer number (14922).

2¹¹⁵⁹⁹⁰ is an apocalyptic number.

115990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

115990 is an abundant number, since it is smaller than the sum of its proper divisors (122762).

It is a weird number, because it is abundant, but not a pseudoperfect number.

115990 is a wasteful number, since it uses less digits than its factorization.

115990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1671.

The product of its (nonzero) digits is 405, while the sum is 25.

The square root of 115990 is about 340.5730464966. The cubic root of 115990 is about 48.7685881340.

The spelling of 115990 in words is "one hundred fifteen thousand, nine hundred ninety".