117639732 has 48 divisors (see below), whose sum is σ = 315342720. Its totient is φ = 33436032.

The previous prime is 117639679. The next prime is 117639737. The reversal of 117639732 is 237936711.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117639737) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12994 + ... + 20102.

It is an arithmetic number, because the mean of its divisors is an integer number (6569640).

Almost surely, 2^117639732 is an apocalyptic number.

117639732 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 117639732, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157671360).

117639732 is an abundant number, since it is smaller than the sum of its proper divisors (197702988).

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

117639732 is a wasteful number, since it uses less digits than its factorization.

117639732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7320 (or 7318 counting only the distinct ones).

The product of its digits is 47628, while the sum is 39.

The square root of 117639732 is about 10846.1851357977. The cubic root of 117639732 is about 489.9871328011.

The spelling of 117639732 in words is "one hundred seventeen million, six hundred thirty-nine thousand, seven hundred thirty-two".