568656 has 60 divisors (see below), whose sum is σ = 1740960. Its totient is φ = 171840.

The previous prime is 568643. The next prime is 568657. The reversal of 568656 is 656865.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 568656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (568657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1405 + ... + 1763.

It is an arithmetic number, because the mean of its divisors is an integer number (29016).

2⁵⁶⁸⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 568656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (870480).

568656 is an abundant number, since it is smaller than the sum of its proper divisors (1172304).

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

568656 is a wasteful number, since it uses less digits than its factorization.

568656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 375 counting only the distinct ones).

The product of its digits is 43200, while the sum is 36.

The square root of 568656 is about 754.0928324815. The cubic root of 568656 is about 82.8482250750.

Subtracting 568656 from its reverse (656865), we obtain a square (88209 = 297²).

The spelling of 568656 in words is "five hundred sixty-eight thousand, six hundred fifty-six".