565638 has 8 divisors (see below), whose sum is σ = 1131288. Its totient is φ = 188544.

The previous prime is 565637. The next prime is 565651. The reversal of 565638 is 836565.

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

565638 is an admirable number.

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

It is a junction number, because it is equal to n+sod(n) for n = 565599 and 565608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (565637) 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, 47131 + ... + 47142.

It is an arithmetic number, because the mean of its divisors is an integer number (141411).

2⁵⁶⁵⁶³⁸ is an apocalyptic number.

565638 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.

565638 is a wasteful number, since it uses less digits than its factorization.

565638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94278.

The product of its digits is 21600, while the sum is 33.

The square root of 565638 is about 752.0890904673. The cubic root of 565638 is about 82.7013995855.

The spelling of 565638 in words is "five hundred sixty-five thousand, six hundred thirty-eight".