28583 has 4 divisors (see below), whose sum is σ = 28968. Its totient is φ = 28200.

The previous prime is 28579. The next prime is 28591. The reversal of 28583 is 38582.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 28583 - 2² = 28579 is a prime.

It is a Duffinian number.

Its product of digits (1920) is a multiple of the sum of its prime divisors (384).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28513) 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 3 ways as a sum of consecutive naturals, for example, 41 + ... + 242.

It is an arithmetic number, because the mean of its divisors is an integer number (7242).

2²⁸⁵⁸³ is an apocalyptic number.

28583 is a deficient number, since it is larger than the sum of its proper divisors (385).

28583 is a wasteful number, since it uses less digits than its factorization.

28583 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384.

The product of its digits is 1920, while the sum is 26.

The square root of 28583 is about 169.0650762281. The cubic root of 28583 is about 30.5751974108.

Adding to 28583 its product of digits (1920), we get a palindrome (30503).

Subtracting 28583 from its reverse (38582), we obtain a palindrome (9999).

The spelling of 28583 in words is "twenty-eight thousand, five hundred eighty-three".