117186816 has 72 divisors (see below), whose sum is σ = 317882880. Its totient is φ = 38311936.

The previous prime is 117186809. The next prime is 117186833. The reversal of 117186816 is 618681711.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39265 + ... + 42143.

It is an arithmetic number, because the mean of its divisors is an integer number (4415040).

Almost surely, 2^117186816 is an apocalyptic number.

117186816 is a gapful number since it is divisible by the number (16) 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 117186816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (158941440).

117186816 is an abundant number, since it is smaller than the sum of its proper divisors (200696064).

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

117186816 is an equidigital number, since it uses as much as digits as its factorization.

117186816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2951 (or 2937 counting only the distinct ones).

The product of its digits is 16128, while the sum is 39.

The square root of 117186816 is about 10825.2859546527. The cubic root of 117186816 is about 489.3575030484.

The spelling of 117186816 in words is "one hundred seventeen million, one hundred eighty-six thousand, eight hundred sixteen".