869564 has 12 divisors (see below), whose sum is σ = 1533000. Its totient is φ = 431568.

The previous prime is 869563. The next prime is 869579. The reversal of 869564 is 465968.

869564 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×869564² = 1512283100192, which contains 22 as substring.

It is a plaindrome in base 15.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 869564.

It is not an unprimeable number, because it can be changed into a prime (869563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134 + ... + 1325.

It is an arithmetic number, because the mean of its divisors is an integer number (127750).

2⁸⁶⁹⁵⁶⁴ is an apocalyptic number.

It is an amenable number.

869564 is a deficient number, since it is larger than the sum of its proper divisors (663436).

869564 is a wasteful number, since it uses less digits than its factorization.

869564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1612 (or 1610 counting only the distinct ones).

The product of its digits is 51840, while the sum is 38.

The square root of 869564 is about 932.5041554867. The cubic root of 869564 is about 95.4480771814.

The spelling of 869564 in words is "eight hundred sixty-nine thousand, five hundred sixty-four".