28085028 has 12 divisors (see below), whose sum is σ = 65531760. Its totient is φ = 9361672.

The previous prime is 28085027. The next prime is 28085051. The reversal of 28085028 is 82058082.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 28085028.

It is not an unprimeable number, because it can be changed into a prime (28085023) 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 3 ways as a sum of consecutive naturals, for example, 1170198 + ... + 1170221.

It is an arithmetic number, because the mean of its divisors is an integer number (5460980).

Almost surely, 2^28085028 is an apocalyptic number.

It is an amenable number.

28085028 is an abundant number, since it is smaller than the sum of its proper divisors (37446732).

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

28085028 is a wasteful number, since it uses less digits than its factorization.

28085028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2340426 (or 2340424 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 33.

The square root of 28085028 is about 5299.5309226383. The cubic root of 28085028 is about 303.9659616783.

The spelling of 28085028 in words is "twenty-eight million, eighty-five thousand, twenty-eight".