869568 has 56 divisors (see below), whose sum is σ = 2633472. Its totient is φ = 248064.

The previous prime is 869563. The next prime is 869579. The reversal of 869568 is 865968.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×869568² = 1512297013248, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 869568.

It is not an unprimeable number, because it can be changed into a prime (869563) 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 7 ways as a sum of consecutive naturals, for example, 1021 + ... + 1667.

2⁸⁶⁹⁵⁶⁸ 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 869568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1316736).

869568 is an abundant number, since it is smaller than the sum of its proper divisors (1763904).

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

869568 is a wasteful number, since it uses less digits than its factorization.

869568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 669 (or 659 counting only the distinct ones).

The product of its digits is 103680, while the sum is 42.

The square root of 869568 is about 932.5063002468. The cubic root of 869568 is about 95.4482235351.

Subtracting from 869568 its reverse (865968), we obtain a square (3600 = 60²).

The spelling of 869568 in words is "eight hundred sixty-nine thousand, five hundred sixty-eight".