543840 has 96 divisors (see below), whose sum is σ = 1886976. Its totient is φ = 130560.

The previous prime is 543827. The next prime is 543841. The reversal of 543840 is 48345.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (24).

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.

It is not an unprimeable number, because it can be changed into a prime (543841) by changing a digit.

543840 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5229 + ... + 5331.

It is an arithmetic number, because the mean of its divisors is an integer number (19656).

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).

543840 is an abundant number, since it is smaller than the sum of its proper divisors (1343136).

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 sum of its prime factors is 132 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

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".