543856 has 20 divisors (see below), whose sum is σ = 1109800. Its totient is φ = 257472.

The previous prime is 543853. The next prime is 543857. The reversal of 543856 is 658345.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (543853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591 + ... + 1198.

It is an arithmetic number, because the mean of its divisors is an integer number (55490).

2⁵⁴³⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

543856 is an abundant number, since it is smaller than the sum of its proper divisors (565944).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

543856 is a wasteful number, since it uses less digits than its factorization.

543856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1816 (or 1810 counting only the distinct ones).

The product of its digits is 14400, while the sum is 31.

The square root of 543856 is about 737.4659314165. The cubic root of 543856 is about 81.6258984819.

The spelling of 543856 in words is "five hundred forty-three thousand, eight hundred fifty-six".