It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.
It is a zygodrome in base 9.
It is a congruent number.
68040 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
268040 is an apocalyptic number.
68040 is a gapful number since it is divisible by the number (60) 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 68040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (131040).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
68040 is a wasteful number, since it uses less digits than its factorization.
68040 is an evil number, because the sum of its binary digits is even.
The square root of 68040 is about 260.8447814314. The cubic root of 68040 is about 40.8245526957.
The spelling of 68040 in words is "sixty-eight thousand, forty".