28814228 has 12 divisors (see below), whose sum is σ = 50473332. Its totient is φ = 14393280.

The previous prime is 28814207. The next prime is 28814249. The reversal of 28814228 is 82241882.

It is an interprime number because it is at equal distance from previous prime (28814207) and next prime (28814249).

It can be written as a sum of positive squares in 2 ways, for example, as 25120144 + 3694084 = 5012^2 + 1922^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

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, 2288 + ... + 7928.

It is an arithmetic number, because the mean of its divisors is an integer number (4206111).

Almost surely, 2^28814228 is an apocalyptic number.

It is an amenable number.

28814228 is a deficient number, since it is larger than the sum of its proper divisors (21659104).

28814228 is a wasteful number, since it uses less digits than its factorization.

28814228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6922 (or 6920 counting only the distinct ones).

The product of its digits is 16384, while the sum is 35.

The square root of 28814228 is about 5367.8885979498. Note that the first 3 decimals coincide. The cubic root of 28814228 is about 306.5742417335.

The spelling of 28814228 in words is "twenty-eight million, eight hundred fourteen thousand, two hundred twenty-eight".