28545 has 16 divisors (see below), whose sum is σ = 50112. Its totient is φ = 13760.

The previous prime is 28541. The next prime is 28547. The reversal of 28545 is 54582.

28545 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 28545 - 2² = 28541 is a prime.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79 + ... + 251.

It is an arithmetic number, because the mean of its divisors is an integer number (3132).

2²⁸⁵⁴⁵ is an apocalyptic number.

It is an amenable number.

28545 is a deficient number, since it is larger than the sum of its proper divisors (21567).

28545 is a wasteful number, since it uses less digits than its factorization.

28545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192.

The product of its digits is 1600, while the sum is 24.

The square root of 28545 is about 168.9526560904. The cubic root of 28545 is about 30.5616418852.

The spelling of 28545 in words is "twenty-eight thousand, five hundred forty-five".