117156172 has 48 divisors (see below), whose sum is σ = 243855360. Its totient is φ = 48186432.

The previous prime is 117156139. The next prime is 117156187. The reversal of 117156172 is 271651711.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180753 + ... + 181399.

It is an arithmetic number, because the mean of its divisors is an integer number (5080320).

Almost surely, 2^117156172 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 117156172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (121927680).

117156172 is an abundant number, since it is smaller than the sum of its proper divisors (126699188).

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

117156172 is a wasteful number, since it uses less digits than its factorization.

117156172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910 (or 908 counting only the distinct ones).

The product of its digits is 2940, while the sum is 31.

The square root of 117156172 is about 10823.8704722479. The cubic root of 117156172 is about 489.3148441580.

The spelling of 117156172 in words is "one hundred seventeen million, one hundred fifty-six thousand, one hundred seventy-two".