28528 has 10 divisors (see below), whose sum is σ = 55304. Its totient is φ = 14256.

The previous prime is 28517. The next prime is 28537. The reversal of 28528 is 82582.

It is a nialpdrome in base 13.

It is a congruent number.

It is an unprimeable number.

28528 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is an upside-down number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 876 + ... + 907.

2²⁸⁵²⁸ is an apocalyptic number.

It is an amenable number.

28528 is a deficient number, since it is larger than the sum of its proper divisors (26776).

28528 is a wasteful number, since it uses less digits than its factorization.

28528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1791 (or 1785 counting only the distinct ones).

The product of its digits is 1280, while the sum is 25.

The square root of 28528 is about 168.9023386457. The cubic root of 28528 is about 30.5555736761. Note that the first 4 decimals are identical.

It can be divided in two parts, 285 and 28, that added together give a palindrome (313).

The spelling of 28528 in words is "twenty-eight thousand, five hundred twenty-eight".