117947816 has 64 divisors (see below), whose sum is σ = 264660480. Its totient is φ = 48222720.

The previous prime is 117947813. The next prime is 117947833. The reversal of 117947816 is 618749711.

It is not an unprimeable number, because it can be changed into a prime (117947813) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107366 + ... + 108458.

It is an arithmetic number, because the mean of its divisors is an integer number (4135320).

Almost surely, 2^117947816 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 117947816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (132330240).

117947816 is an abundant number, since it is smaller than the sum of its proper divisors (146712664).

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

117947816 is a wasteful number, since it uses less digits than its factorization.

117947816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1194 (or 1190 counting only the distinct ones).

The product of its digits is 84672, while the sum is 44.

The square root of 117947816 is about 10860.3782622890. The cubic root of 117947816 is about 490.4144986386.

The spelling of 117947816 in words is "one hundred seventeen million, nine hundred forty-seven thousand, eight hundred sixteen".