17940 is nontrivially palindromic in base 14.
It is a nialpdrome in base 13.
It is a congruent number.
It is an unprimeable number.
217940 is an apocalyptic number.
17940 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 17940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28224).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
17940 is a wasteful number, since it uses less digits than its factorization.
17940 is an odious number, because the sum of its binary digits is odd.
The square root of 17940 is about 133.9402852020. The cubic root of 17940 is about 26.1782621784.
The spelling of 17940 in words is "seventeen thousand, nine hundred forty".