117431688 has 32 divisors (see below), whose sum is σ = 320268960. Its totient is φ = 35585280.

The previous prime is 117431687. The next prime is 117431711. The reversal of 117431688 is 886134711.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (117431687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 222145 + ... + 222672.

It is an arithmetic number, because the mean of its divisors is an integer number (10008405).

Almost surely, 2^117431688 is an apocalyptic number.

It is an amenable number.

117431688 is an abundant number, since it is smaller than the sum of its proper divisors (202837272).

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

117431688 is a wasteful number, since it uses less digits than its factorization.

117431688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444837 (or 444833 counting only the distinct ones).

The product of its digits is 32256, while the sum is 39.

The square root of 117431688 is about 10836.5902386313. The cubic root of 117431688 is about 489.6981175371.

It can be divided in two parts, 11743 and 1688, that added together give a palindrome (13431).

The spelling of 117431688 in words is "one hundred seventeen million, four hundred thirty-one thousand, six hundred eighty-eight".