It is a tau number, because it is divible by the number of its divisors (40).
It is a congruent number.
2117840 is an apocalyptic number.
117840 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 117840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (183024).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
117840 is a wasteful number, since it uses less digits than its factorization.
117840 is an odious number, because the sum of its binary digits is odd.
The square root of 117840 is about 343.2783127435. The cubic root of 117840 is about 49.0265023923.
The spelling of 117840 in words is "one hundred seventeen thousand, eight hundred forty".