28084028 has 12 divisors (see below), whose sum is σ = 56168112. Its totient is φ = 12036000.

The previous prime is 28084027. The next prime is 28084061. The reversal of 28084028 is 82048082.

28084028 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 28083985 and 28084003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28084027) 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 in 3 ways as a sum of consecutive naturals, for example, 501473 + ... + 501528.

It is an arithmetic number, because the mean of its divisors is an integer number (4680676).

Almost surely, 2^28084028 is an apocalyptic number.

28084028 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28084028 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28084028 is a wasteful number, since it uses less digits than its factorization.

28084028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1003012 (or 1003010 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 32.

The square root of 28084028 is about 5299.4365738256. The cubic root of 28084028 is about 303.9623539486.

The spelling of 28084028 in words is "twenty-eight million, eighty-four thousand, twenty-eight".