117831868 has 144 divisors (see below), whose sum is σ = 283143168. Its totient is φ = 42336000.

The previous prime is 117831799. The next prime is 117831871. The reversal of 117831868 is 868138711.

It is a Harshad number since it is a multiple of its sum of digits (43).

Its product of digits (64512) is a multiple of the sum of its prime factors (144).

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, 2740255 + ... + 2740297.

It is an arithmetic number, because the mean of its divisors is an integer number (1966272).

Almost surely, 2^117831868 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117831868, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (141571584).

117831868 is an abundant number, since it is smaller than the sum of its proper divisors (165311300).

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

117831868 is a wasteful number, since it uses less digits than its factorization.

117831868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144 (or 135 counting only the distinct ones).

The product of its digits is 64512, while the sum is 43.

The square root of 117831868 is about 10855.0388299628. The cubic root of 117831868 is about 490.2537461261.

The spelling of 117831868 in words is "one hundred seventeen million, eight hundred thirty-one thousand, eight hundred sixty-eight".