On Monday, Apple announced it sold more than 300,000 of its new tablet computers on Saturday.
That figure included preordered iPads delivered to customers, sales at its retail stores, and deliveries to channel partners.
In addition, Apple said, iPad owners downloaded more 1 million iPad apps and 250,000 e-books from Apple's iBookstore on Saturday.
Piper Jaffray senior analyst Gene Munster had originally predicted Apple would sell between 200,000 and 300,000 iPads on the first day, though he upped his estimate to 600,00 to 700,000 over the weekend.
Only Wi-Fi iPad models are available right now. Apple will begin selling models with Wi-Fi and 3G in late April.
"It feels great to have the iPad launched into the world--it's going to be a game changer," Apple CEO Steve Jobs said in a statement Monday.