868564 has 24 divisors (see below), whose sum is σ = 1646568. Its totient is φ = 399360.

The previous prime is 868561. The next prime is 868577. The reversal of 868564 is 465868.

It can be written as a sum of positive squares in 4 ways, for example, as 435600 + 432964 = 660^2 + 658^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (868561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3484 + ... + 3724.

It is an arithmetic number, because the mean of its divisors is an integer number (68607).

2⁸⁶⁸⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

868564 is a deficient number, since it is larger than the sum of its proper divisors (778004).

868564 is a wasteful number, since it uses less digits than its factorization.

868564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 315 (or 313 counting only the distinct ones).

The product of its digits is 46080, while the sum is 37.

The square root of 868564 is about 931.9678106029. The cubic root of 868564 is about 95.4114746661.

The spelling of 868564 in words is "eight hundred sixty-eight thousand, five hundred sixty-four".