It's about one-six-hundred-fifty-thousandth the number of Chickens in the World.
In other words, the count of Chickens in the World is 670,000 times 28,000.(a.k.a. fowl) (Gallus gallus domesticus) (2011 figures) (average population)
It's about 0.00000010 times the number of Emails Sent per Day.
In other words, 28,000 is 0.00000009520 times the count of Emails Sent per Day, and the count of Emails Sent per Day is 10,500,000 times that amount.(2010 figures) (estimated averages)
Each day, human computer users and automated programs send about 294 billion emails. Of those, an estimated 214 billion emails are spam advertisements for pharmaceuticals or drugs.