28224189 has 12 divisors (see below), whose sum is σ = 46592416. Its totient is φ = 16128072.

The previous prime is 28224173. The next prime is 28224191. The reversal of 28224189 is 98142282.

It is not a de Polignac number, because 28224189 - 2⁴ = 28224173 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28224109) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 223939 + ... + 224064.

Almost surely, 2^28224189 is an apocalyptic number.

It is an amenable number.

28224189 is a deficient number, since it is larger than the sum of its proper divisors (18368227).

28224189 is a wasteful number, since it uses less digits than its factorization.

28224189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 448016 (or 448013 counting only the distinct ones).

The product of its digits is 18432, while the sum is 36.

The square root of 28224189 is about 5312.6442568649. The cubic root of 28224189 is about 304.4671840520.

The spelling of 28224189 in words is "twenty-eight million, two hundred twenty-four thousand, one hundred eighty-nine".