115161858 has 96 divisors (see below), whose sum is σ = 302382720. Its totient is φ = 32387040.

The previous prime is 115161847. The next prime is 115161877. The reversal of 115161858 is 858161511.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 187560 + ... + 188172.

It is an arithmetic number, because the mean of its divisors is an integer number (3149820).

Almost surely, 2^115161858 is an apocalyptic number.

115161858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 115161858, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (151191360).

115161858 is an abundant number, since it is smaller than the sum of its proper divisors (187220862).

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

115161858 is a wasteful number, since it uses less digits than its factorization.

115161858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 696 counting only the distinct ones).

The product of its digits is 9600, while the sum is 36.

The square root of 115161858 is about 10731.3493093832. The cubic root of 115161858 is about 486.5224529430.

The spelling of 115161858 in words is "one hundred fifteen million, one hundred sixty-one thousand, eight hundred fifty-eight".