117665928 has 48 divisors (see below), whose sum is σ = 320474700. Its totient is φ = 39000960.

The previous prime is 117665927. The next prime is 117665939. The reversal of 117665928 is 829566711.

It can be written as a sum of positive squares in 2 ways, for example, as 117548964 + 116964 = 10842^2 + 342^2 .

It is a super-2 number, since 2×117665928² = 27690541224202368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (117665927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8518 + ... + 17546.

Almost surely, 2^117665928 is an apocalyptic number.

117665928 is a gapful number since it is divisible by the number (18) 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 117665928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160237350).

117665928 is an abundant number, since it is smaller than the sum of its proper divisors (202808772).

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

117665928 is a wasteful number, since it uses less digits than its factorization.

117665928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9222 (or 9215 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 117665928 is about 10847.3926821149. The cubic root of 117665928 is about 490.0235001918.

The spelling of 117665928 in words is "one hundred seventeen million, six hundred sixty-five thousand, nine hundred twenty-eight".