57840 is digitally balanced in base 2, because in such base 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 (40).
It is a zygodrome in base 2.
It is a self number, because there is not a number n which added to its sum of digits gives 57840.
It is a congruent number.
257840 is an apocalyptic number.
It is an amenable number.
It is a practical number, because each smaller number is the sum of distinct divisors of 57840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90024).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
57840 is a wasteful number, since it uses less digits than its factorization.
57840 is an evil number, because the sum of its binary digits is even.
The square root of 57840 is about 240.4994802489. The cubic root of 57840 is about 38.6731393577.
The spelling of 57840 in words is "fifty-seven thousand, eight hundred forty".