115321830 has 128 divisors (see below), whose sum is σ = 319334400. Its totient is φ = 26417664.

The previous prime is 115321783. The next prime is 115321841. The reversal of 115321830 is 38123511.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 115321830.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 585292 + ... + 585488.

It is an arithmetic number, because the mean of its divisors is an integer number (2494800).

Almost surely, 2^115321830 is an apocalyptic number.

115321830 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 115321830, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159667200).

115321830 is an abundant number, since it is smaller than the sum of its proper divisors (204012570).

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

115321830 is a wasteful number, since it uses less digits than its factorization.

115321830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 115321830 is about 10738.8002123142. The cubic root of 115321830 is about 486.7476257591.

The spelling of 115321830 in words is "one hundred fifteen million, three hundred twenty-one thousand, eight hundred thirty".