28030028 has 12 divisors (see below), whose sum is σ = 52825920. Its totient is φ = 12936912.

The previous prime is 28030007. The next prime is 28030033. The reversal of 28030028 is 82003082.

It is a junction number, because it is equal to n+sod(n) for n = 28029985 and 28030012.

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, 269468 + ... + 269571.

It is an arithmetic number, because the mean of its divisors is an integer number (4402160).

Almost surely, 2^28030028 is an apocalyptic number.

It is an amenable number.

28030028 is a deficient number, since it is larger than the sum of its proper divisors (24795892).

28030028 is a wasteful number, since it uses less digits than its factorization.

28030028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539056 (or 539054 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 23.

The square root of 28030028 is about 5294.3392411140. The cubic root of 28030028 is about 303.7674092321.

The spelling of 28030028 in words is "twenty-eight million, thirty thousand, twenty-eight".