28225328 has 20 divisors (see below), whose sum is σ = 54826848. Its totient is φ = 14076480.

The previous prime is 28225319. The next prime is 28225331. The reversal of 28225328 is 82352282.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28225294 and 28225303.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4850 + ... + 8942.

Almost surely, 2^28225328 is an apocalyptic number.

It is an amenable number.

28225328 is a deficient number, since it is larger than the sum of its proper divisors (26601520).

28225328 is a wasteful number, since it uses less digits than its factorization.

28225328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4532 (or 4526 counting only the distinct ones).

The product of its digits is 15360, while the sum is 32.

The square root of 28225328 is about 5312.7514528726. The cubic root of 28225328 is about 304.4712796342.

The spelling of 28225328 in words is "twenty-eight million, two hundred twenty-five thousand, three hundred twenty-eight".