117820928 has 40 divisors (see below), whose sum is σ = 236435760. Its totient is φ = 58654720.

The previous prime is 117820873. The next prime is 117820933. The reversal of 117820928 is 829028711.

It is a junction number, because it is equal to n+sod(n) for n = 117820891 and 117820900.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 183488 + ... + 184128.

It is an arithmetic number, because the mean of its divisors is an integer number (5910894).

Almost surely, 2^117820928 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 117820928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118217880).

117820928 is an abundant number, since it is smaller than the sum of its proper divisors (118614832).

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

117820928 is an frugal number, since it uses more digits than its factorization.

117820928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1018 (or 1002 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 38.

The square root of 117820928 is about 10854.5349048220. The cubic root of 117820928 is about 490.2385732586.

The spelling of 117820928 in words is "one hundred seventeen million, eight hundred twenty thousand, nine hundred twenty-eight".