28022528 has 72 divisors (see below), whose sum is σ = 60927552. Its totient is φ = 12812288.

The previous prime is 28022521. The next prime is 28022563. The reversal of 28022528 is 82522082.

It is a self number, because there is not a number n which added to its sum of digits gives 28022528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28022521) 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, 204476 + ... + 204612.

It is an arithmetic number, because the mean of its divisors is an integer number (846216).

Almost surely, 2^28022528 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28022528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30463776).

28022528 is an abundant number, since it is smaller than the sum of its proper divisors (32905024).

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

28022528 is a wasteful number, since it uses less digits than its factorization.

28022528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 29.

The square root of 28022528 is about 5293.6308900414. The cubic root of 28022528 is about 303.7403137806.

The spelling of 28022528 in words is "twenty-eight million, twenty-two thousand, five hundred twenty-eight".