117800172 has 72 divisors (see below), whose sum is σ = 341309696. Its totient is φ = 33558624.

The previous prime is 117800161. The next prime is 117800197. The reversal of 117800172 is 271008711.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 161673 + ... + 162399.

Almost surely, 2^117800172 is an apocalyptic number.

117800172 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 117800172, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170654848).

117800172 is an abundant number, since it is smaller than the sum of its proper divisors (223509524).

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

117800172 is a wasteful number, since it uses less digits than its factorization.

117800172 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1387 (or 1382 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 27.

The square root of 117800172 is about 10853.5787646287. The cubic root of 117800172 is about 490.2097838361.

Adding to 117800172 its reverse (271008711), we get a palindrome (388808883).

The spelling of 117800172 in words is "one hundred seventeen million, eight hundred thousand, one hundred seventy-two".