28567 has 12 divisors (see below), whose sum is σ = 36936. Its totient is φ = 21840.

The previous prime is 28559. The next prime is 28571. The reversal of 28567 is 76582.

It is not a de Polignac number, because 28567 - 2³ = 28559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 513 + ... + 565.

It is an arithmetic number, because the mean of its divisors is an integer number (3078).

2²⁸⁵⁶⁷ is an apocalyptic number.

28567 is a deficient number, since it is larger than the sum of its proper divisors (8369).

28567 is a wasteful number, since it uses less digits than its factorization.

28567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78 (or 71 counting only the distinct ones).

The product of its digits is 3360, while the sum is 28.

The square root of 28567 is about 169.0177505471. The cubic root of 28567 is about 30.5694912863.

It can be divided in two parts, 28 and 567, that multiplied together give a square (15876 = 126²).

The spelling of 28567 in words is "twenty-eight thousand, five hundred sixty-seven".