28568 has 8 divisors (see below), whose sum is σ = 53580. Its totient is φ = 14280.

The previous prime is 28559. The next prime is 28571. The reversal of 28568 is 86582.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×28568² = 1632261248, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28568.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1778 + ... + 1793.

2²⁸⁵⁶⁸ is an apocalyptic number.

It is an amenable number.

28568 is a deficient number, since it is larger than the sum of its proper divisors (25012).

28568 is a wasteful number, since it uses less digits than its factorization.

28568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3577 (or 3573 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 28568 is about 169.0207087904. The cubic root of 28568 is about 30.5698479815.

It can be divided in two parts, 285 and 68, that added together give a palindrome (353).

The spelling of 28568 in words is "twenty-eight thousand, five hundred sixty-eight".