28847228 has 12 divisors (see below), whose sum is σ = 52223640. Its totient is φ = 13926192.

The previous prime is 28847219. The next prime is 28847243. The reversal of 28847228 is 82274882.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 124226 + ... + 124457.

It is an arithmetic number, because the mean of its divisors is an integer number (4351970).

Almost surely, 2^28847228 is an apocalyptic number.

It is an amenable number.

28847228 is a deficient number, since it is larger than the sum of its proper divisors (23376412).

28847228 is a wasteful number, since it uses less digits than its factorization.

28847228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248716 (or 248714 counting only the distinct ones).

The product of its digits is 114688, while the sum is 41.

The square root of 28847228 is about 5370.9615526459. The cubic root of 28847228 is about 306.6912335917.

The spelling of 28847228 in words is "twenty-eight million, eight hundred forty-seven thousand, two hundred twenty-eight".