63840 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.
It is a tau number, because it is divible by the number of its divisors (96).
It is a nialpdrome in base 16.
It is a congruent number.
263840 is an apocalyptic number.
63840 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 63840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (120960).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
63840 is a wasteful number, since it uses less digits than its factorization.
63840 is an evil number, because the sum of its binary digits is even.
The square root of 63840 is about 252.6657871577. The cubic root of 63840 is about 39.9666388502.
The spelling of 63840 in words is "sixty-three thousand, eight hundred forty".