The First Mile High Skyscraper

The first mile high skyscraper, the Kingdom Tower, is scheduled to be built in Sadi Arabia. The project is going to cost between 20-30 billions US dollars.
Standing at 5,280 feet tall, the Kingdom tower is smashing the current world record of 2,700 feet, held by Burj Khalifa in Dubai.
Not much info is known about this, such as how many stories it's going to be. It could be as many as 528, but they might make floors taller or shorter, and some levels might need to be solid to help support the building. I is also not known when the project is planned to be completed.