28028328 has 16 divisors (see below), whose sum is σ = 70070880. Its totient is φ = 9342768.

The previous prime is 28028327. The next prime is 28028347. The reversal of 28028328 is 82382082.

It is not an unprimeable number, because it can be changed into a prime (28028321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 583900 + ... + 583947.

It is an arithmetic number, because the mean of its divisors is an integer number (4379430).

Almost surely, 2^28028328 is an apocalyptic number.

It is an amenable number.

28028328 is an abundant number, since it is smaller than the sum of its proper divisors (42042552).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28028328 is a wasteful number, since it uses less digits than its factorization.

28028328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167856 (or 1167852 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 28028328 is about 5294.1786898442. The cubic root of 28028328 is about 303.7612680201.

The spelling of 28028328 in words is "twenty-eight million, twenty-eight thousand, three hundred twenty-eight".