117388816 has 40 divisors (see below), whose sum is σ = 235842048. Its totient is φ = 56544000.

The previous prime is 117388801. The next prime is 117388829. The reversal of 117388816 is 618883711.

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, 153876 + ... + 154636.

Almost surely, 2^117388816 is an apocalyptic number.

117388816 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 117388816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117921024).

117388816 is an abundant number, since it is smaller than the sum of its proper divisors (118453232).

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

117388816 is a wasteful number, since it uses less digits than its factorization.

117388816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1111 (or 1105 counting only the distinct ones).

The product of its digits is 64512, while the sum is 43.

The square root of 117388816 is about 10834.6119450583. The cubic root of 117388816 is about 489.6385172326.

The spelling of 117388816 in words is "one hundred seventeen million, three hundred eighty-eight thousand, eight hundred sixteen".