It is a happy number.
It is a tau number, because it is divible by the number of its divisors (96).
It is a self number, because there is not a number n which added to its sum of digits gives 543840.
It is a congruent number.
543840 is an untouchable number, because it is not equal to the sum of proper divisors of any number.
2543840 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 543840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943488).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
543840 is a wasteful number, since it uses less digits than its factorization.
543840 is an evil number, because the sum of its binary digits is even.
The square root of 543840 is about 737.4550833780. The cubic root of 543840 is about 81.6250980083.
The spelling of 543840 in words is "five hundred forty-three thousand, eight hundred forty".