28804228 has 24 divisors (see below), whose sum is σ = 54069120. Its totient is φ = 13384800.

The previous prime is 28804207. The next prime is 28804229. The reversal of 28804228 is 82240882.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 28804193 and 28804202.

It is not an unprimeable number, because it can be changed into a prime (28804229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 453 + ... + 7603.

It is an arithmetic number, because the mean of its divisors is an integer number (2252880).

Almost surely, 2^28804228 is an apocalyptic number.

It is an amenable number.

28804228 is a deficient number, since it is larger than the sum of its proper divisors (25264892).

28804228 is a wasteful number, since it uses less digits than its factorization.

28804228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7227 (or 7225 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 34.

The square root of 28804228 is about 5366.9570521852. The cubic root of 28804228 is about 306.5387720211.

The spelling of 28804228 in words is "twenty-eight million, eight hundred four thousand, two hundred twenty-eight".