28024 has 16 divisors (see below), whose sum is σ = 54720. Its totient is φ = 13440.

The previous prime is 28019. The next prime is 28027. The reversal of 28024 is 42082.

28024 is an undulating number in base 15.

It is a junction number, because it is equal to n+sod(n) for n = 27989 and 28007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28027) by changing a digit.

28024 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192 + ... + 304.

It is an arithmetic number, because the mean of its divisors is an integer number (3420).

2²⁸⁰²⁴ is an apocalyptic number.

It is an amenable number.

28024 is a deficient number, since it is larger than the sum of its proper divisors (26696).

28024 is a wasteful number, since it uses less digits than its factorization.

28024 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 28024 is about 167.4037036627. The cubic root of 28024 is about 30.3745632096.

The spelling of 28024 in words is "twenty-eight thousand, twenty-four".