28867228 has 18 divisors (see below), whose sum is σ = 54703824. Its totient is φ = 13323024.

The previous prime is 28867217. The next prime is 28867253. The reversal of 28867228 is 82276882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20676 + ... + 22027.

Almost surely, 2^28867228 is an apocalyptic number.

It is an amenable number.

28867228 is a deficient number, since it is larger than the sum of its proper divisors (25836596).

28867228 is a wasteful number, since it uses less digits than its factorization.

28867228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42733 (or 42718 counting only the distinct ones).

The product of its digits is 172032, while the sum is 43.

The square root of 28867228 is about 5372.8230940540. The cubic root of 28867228 is about 306.7620943306.

The spelling of 28867228 in words is "twenty-eight million, eight hundred sixty-seven thousand, two hundred twenty-eight".