28524 has 12 divisors (see below), whose sum is σ = 66584. Its totient is φ = 9504.

The previous prime is 28517. The next prime is 28537. The reversal of 28524 is 42582.

It is a tau number, because it is divible by the number of its divisors (12).

It is a nialpdrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 28524.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1177 + ... + 1200.

2²⁸⁵²⁴ is an apocalyptic number.

It is an amenable number.

28524 is an abundant number, since it is smaller than the sum of its proper divisors (38060).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33292).

28524 is a wasteful number, since it uses less digits than its factorization.

28524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2384 (or 2382 counting only the distinct ones).

The product of its digits is 640, while the sum is 21.

The square root of 28524 is about 168.8904970684. The cubic root of 28524 is about 30.5541455119.

The spelling of 28524 in words is "twenty-eight thousand, five hundred twenty-four".