115290 has 64 divisors (see below), whose sum is σ = 357120. Its totient is φ = 25920.

The previous prime is 115279. The next prime is 115301. The reversal of 115290 is 92511.

It is an interprime number because it is at equal distance from previous prime (115279) and next prime (115301).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1860 + ... + 1920.

It is an arithmetic number, because the mean of its divisors is an integer number (5580).

2¹¹⁵²⁹⁰ is an apocalyptic number.

115290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 115290, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178560).

115290 is an abundant number, since it is smaller than the sum of its proper divisors (241830).

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

115290 is a wasteful number, since it uses less digits than its factorization.

115290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 18.

The square root of 115290 is about 339.5438116061. The cubic root of 115290 is about 48.6702839204.

The spelling of 115290 in words is "one hundred fifteen thousand, two hundred ninety".