563646 has 8 divisors (see below), whose sum is σ = 1127304. Its totient is φ = 187880.

The previous prime is 563623. The next prime is 563657. The reversal of 563646 is 646365.

It is a sphenic number, since it is the product of 3 distinct primes.

563646 is an admirable number.

It is a plaindrome in base 16.

It is a congruent number.

It is an unprimeable number.

563646 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 (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46965 + ... + 46976.

It is an arithmetic number, because the mean of its divisors is an integer number (140913).

2⁵⁶³⁶⁴⁶ is an apocalyptic number.

563646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

563646 is a wasteful number, since it uses less digits than its factorization.

563646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93946.

The product of its digits is 12960, while the sum is 30.

The square root of 563646 is about 750.7636112652. The cubic root of 563646 is about 82.6042025819.

The spelling of 563646 in words is "five hundred sixty-three thousand, six hundred forty-six".