28065028 has 24 divisors (see below), whose sum is σ = 52520832. Its totient is φ = 13075584.

The previous prime is 28064999. The next prime is 28065029. The reversal of 28065028 is 82056082.

It is not an unprimeable number, because it can be changed into a prime (28065029) 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, 5001 + ... + 9007.

It is an arithmetic number, because the mean of its divisors is an integer number (2188368).

Almost surely, 2^28065028 is an apocalyptic number.

It is an amenable number.

28065028 is a deficient number, since it is larger than the sum of its proper divisors (24455804).

28065028 is a wasteful number, since it uses less digits than its factorization.

28065028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4131 (or 4129 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 28065028 is about 5297.6436271233. The cubic root of 28065028 is about 303.8937908064.

The spelling of 28065028 in words is "twenty-eight million, sixty-five thousand, twenty-eight".