117939840 has 256 divisors, whose sum is σ = 409795200. Its totient is φ = 28753920.

The previous prime is 117939827. The next prime is 117939847. The reversal of 117939840 is 48939711.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 117939792 and 117939801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117939847) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1933410 + ... + 1933470.

Almost surely, 2^117939840 is an apocalyptic number.

117939840 is a gapful number since it is divisible by the number (10) 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 117939840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204897600).

117939840 is an abundant number, since it is smaller than the sum of its proper divisors (291855360).

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

117939840 is a wasteful number, since it uses less digits than its factorization.

117939840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 143 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 117939840 is about 10860.0110497181. The cubic root of 117939840 is about 490.4034439356.

The spelling of 117939840 in words is "one hundred seventeen million, nine hundred thirty-nine thousand, eight hundred forty".