543820 has 12 divisors (see below), whose sum is σ = 1142064. Its totient is φ = 217520.

The previous prime is 543811. The next prime is 543827. The reversal of 543820 is 28345.

It is a junction number, because it is equal to n+sod(n) for n = 543791 and 543800.

It is not an unprimeable number, because it can be changed into a prime (543827) by changing a digit.

543820 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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, 13576 + ... + 13615.

It is an arithmetic number, because the mean of its divisors is an integer number (95172).

2⁵⁴³⁸²⁰ is an apocalyptic number.

It is an amenable number.

543820 is an abundant number, since it is smaller than the sum of its proper divisors (598244).

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

543820 is a wasteful number, since it uses less digits than its factorization.

543820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27200 (or 27198 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 543820 is about 737.4415231054. The cubic root of 543820 is about 81.6240973942.

The spelling of 543820 in words is "five hundred forty-three thousand, eight hundred twenty".