117809856 has 112 divisors (see below), whose sum is σ = 351129600. Its totient is φ = 38727936.

The previous prime is 117809821. The next prime is 117809869. The reversal of 117809856 is 658908711.

It is a zygodrome in base 12.

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, 136081 + ... + 136943.

Almost surely, 2^117809856 is an apocalyptic number.

117809856 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 117809856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (175564800).

117809856 is an abundant number, since it is smaller than the sum of its proper divisors (233319744).

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

117809856 is an equidigital number, since it uses as much as digits as its factorization.

117809856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 963 (or 947 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 117809856 is about 10854.0248755934. The cubic root of 117809856 is about 490.2232163617.

The spelling of 117809856 in words is "one hundred seventeen million, eight hundred nine thousand, eight hundred fifty-six".