563820 has 24 divisors (see below), whose sum is σ = 1578864. Its totient is φ = 150336.

The previous prime is 563813. The next prime is 563821. The reversal of 563820 is 28365.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 563820.

It is not an unprimeable number, because it can be changed into a prime (563821) by changing a digit.

563820 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 7 ways as a sum of consecutive naturals, for example, 4639 + ... + 4758.

It is an arithmetic number, because the mean of its divisors is an integer number (65786).

2⁵⁶³⁸²⁰ is an apocalyptic number.

It is an amenable number.

563820 is an abundant number, since it is smaller than the sum of its proper divisors (1015044).

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

563820 is a wasteful number, since it uses less digits than its factorization.

563820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9409 (or 9407 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 563820 is about 750.8794843382. The cubic root of 563820 is about 82.6127018010.

The spelling of 563820 in words is "five hundred sixty-three thousand, eight hundred twenty".