Apple's much-anticipated, much-debated iPad hits retail shelves on Saturday, April 3 — after what seems like a thousand years of hype. Here's a look at the real numbers that define the device Steve Jobs has described as "magical and revolutionary":

The number of iPad models Apple is offering

The number of iPad video "Guided Tours" Apple rolled out Monday to promote the gadget

Price of cheapest iPad, with 16GB of memory and Wi-Fi

Price of most expensive iPad, with 64GB of memory, Wi-Fi, and 3G wireless

Price of the "BookArc for iPad," a stand that lets you use the new device as a standard computer. "Don’t your arms get a little tired from holding your iPad all day long?" asks PC World. "OK, so no one, outside of a chosen few, have experienced iPad-fatigued appendages as of yet, but you know it’s coming."

Time at which Apple stores will open Saturday morning and begin selling iPads

The number of Apple retail stores in the U.S.

The number of lucky Best Buy locations that will have iPads for sale on Saturday

The number of iPads each Best Buy will have on hand

How many of those iPads the Best Buys might be able to sell — given that at least four are to be retained for display purposes, according to a leaked Apple memo

"Hundred of thousands"
Number of iPads sold by Apple during the first week of a pre-sales period, which began on March 12. 

3-4 million
Average Wall Street estimate on how many iPads Apple will sell in 2010. (Keeping in mind those forecasts predate Apple's announcement about selling the gadgets at Best Buys, says ZDNet's Larry Dignan.)

8-10 million
Morgan Stanley analyst Katy Huberty's estimate for 2010 iPad sales

1.2 million
Number of iPhones Apple sold in the first three months of its 2007 release

50 million
Estimated number of iPods Apple sells each year

Apple's all-time-high stock price, hit Monday, after the company unveiled the details for its iPad launch

The amount Apple's earnings per share will rise with every million iPads it sells, according to Morgan Stanley's Huberty

Percentage of consumers interested in buying an iPad, according to research firm NPD

Percentage of current Apple device owners interested or very interested in buying an iPad

Percentage of 18- to 34-year-olds interested or very interested in buying an iPad

Percentage of prospective iPad buyers who say they'd use the device for "conducting work," according to enterprise software vendor Sybase

Percentage who say they'd watch video or TV on the iPad

Number of iPad apps expected to be available for download April 3

How many dollars the typical iPad app will cost

Number of iPhone apps — which also work on the iPad — available through iTunes

Percentage of downloaded iPhone apps that cost nothing

Number of books available at launch through the iBooks e-reader application, versus more than 400,000 currently available for Amazon's Kindle

Number of journalists at major publications, including The New York Times, Wall Street Journal and Chicago Sun-Times, given early access to the iPad

Number of gadget blogs given access to the iPad for review, including top sites Gizmodo and Engadget

Sources: Washington Post, Wall St. Journal (2) (3), BusinessWeek, TechCrunch, Ars Technica, Fortune, San Jose Mercury News, ZDNet, TUAW, AllThingsD, Register, Business Insider, Huffington Post