117831930 has 128 divisors (see below), whose sum is σ = 320993280. Its totient is φ = 27525120.

The previous prime is 117831929. The next prime is 117831937. The reversal of 117831930 is 39138711.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 117831891 and 117831900.

It is not an unprimeable number, because it can be changed into a prime (117831937) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 458362 + ... + 458618.

It is an arithmetic number, because the mean of its divisors is an integer number (2507760).

Almost surely, 2^117831930 is an apocalyptic number.

117831930 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 117831930, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160496640).

117831930 is an abundant number, since it is smaller than the sum of its proper divisors (203161350).

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

117831930 is a wasteful number, since it uses less digits than its factorization.

117831930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344.

The product of its (nonzero) digits is 4536, while the sum is 33.

The square root of 117831930 is about 10855.0416857790. The cubic root of 117831930 is about 490.2538321123.

The spelling of 117831930 in words is "one hundred seventeen million, eight hundred thirty-one thousand, nine hundred thirty".