568640 has 28 divisors (see below), whose sum is σ = 1354836. Its totient is φ = 227328.

The previous prime is 568627. The next prime is 568643. The reversal of 568640 is 46865.

It can be written as a sum of positive squares in 2 ways, for example, as 246016 + 322624 = 496^2 + 568^2 .

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (568643) by changing a digit.

568640 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 (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 569 + ... + 1208.

It is an arithmetic number, because the mean of its divisors is an integer number (48387).

2⁵⁶⁸⁶⁴⁰ is an apocalyptic number.

It is an amenable number.

568640 is an abundant number, since it is smaller than the sum of its proper divisors (786196).

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

568640 is a wasteful number, since it uses less digits than its factorization.

568640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1794 (or 1784 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 29.

The square root of 568640 is about 754.0822236335. The cubic root of 568640 is about 82.8474480475.

The spelling of 568640 in words is "five hundred sixty-eight thousand, six hundred forty".