285568 has 32 divisors (see below), whose sum is σ = 599760. Its totient is φ = 135168.

The previous prime is 285559. The next prime is 285569. The reversal of 285568 is 865582.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (285569) by changing a digit.

285568 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, 2896 + ... + 2992.

2²⁸⁵⁵⁶⁸ 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 285568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299880).

285568 is an abundant number, since it is smaller than the sum of its proper divisors (314192).

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

285568 is an equidigital number, since it uses as much as digits as its factorization.

285568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134 (or 122 counting only the distinct ones).

The product of its digits is 19200, while the sum is 34.

The square root of 285568 is about 534.3856285493. The cubic root of 285568 is about 65.8521329991.

The spelling of 285568 in words is "two hundred eighty-five thousand, five hundred sixty-eight".