563644 has 24 divisors (see below), whose sum is σ = 1053360. Its totient is φ = 263424.

The previous prime is 563623. The next prime is 563657. The reversal of 563644 is 446365.

563644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4932 + ... + 5044.

It is an arithmetic number, because the mean of its divisors is an integer number (43890).

2⁵⁶³⁶⁴⁴ is an apocalyptic number.

It is an amenable number.

563644 is a deficient number, since it is larger than the sum of its proper divisors (489716).

563644 is a wasteful number, since it uses less digits than its factorization.

563644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 187 counting only the distinct ones).

The product of its digits is 8640, while the sum is 28.

The square root of 563644 is about 750.7622792869. The cubic root of 563644 is about 82.6041048796.

It can be divided in two parts, 56364 and 4, that multiplied together give a triangular number (225456 = T₆₇₁).

The spelling of 563644 in words is "five hundred sixty-three thousand, six hundred forty-four".