22028 has 6 divisors (see below), whose sum is σ = 38556. Its totient is φ = 11012.

The previous prime is 22027. The next prime is 22031. The reversal of 22028 is 82022.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 22028.

It is not an unprimeable number, because it can be changed into a prime (22027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2750 + ... + 2757.

It is an arithmetic number, because the mean of its divisors is an integer number (6426).

2²²⁰²⁸ is an apocalyptic number.

It is an amenable number.

22028 is a deficient number, since it is larger than the sum of its proper divisors (16528).

22028 is a wasteful number, since it uses less digits than its factorization.

22028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5511 (or 5509 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 22028 is about 148.4183277092. The cubic root of 22028 is about 28.0322757065.

The spelling of 22028 in words is "twenty-two thousand, twenty-eight".