28563328 has 16 divisors (see below), whose sum is σ = 56903760. Its totient is φ = 14281600.

The previous prime is 28563323. The next prime is 28563331. The reversal of 28563328 is 82336582.

It is a tau number, because it is divible by the number of its divisors (16).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28563323) by changing a digit.

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 as a sum of consecutive naturals, namely, 111448 + ... + 111703.

It is an arithmetic number, because the mean of its divisors is an integer number (3556485).

Almost surely, 2^28563328 is an apocalyptic number.

It is an amenable number.

28563328 is a deficient number, since it is larger than the sum of its proper divisors (28340432).

28563328 is an equidigital number, since it uses as much as digits as its factorization.

28563328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223165 (or 223153 counting only the distinct ones).

The product of its digits is 69120, while the sum is 37.

The square root of 28563328 is about 5344.4670454593. The cubic root of 28563328 is about 305.6818143019.

The spelling of 28563328 in words is "twenty-eight million, five hundred sixty-three thousand, three hundred twenty-eight".