2.35 million viewers. Thats a reverse mirror game with ASU vs USC showing in the far western portion of the US, so our actual rating is theoretically half that number (though I suspect it probably more looking at the broadcast map). The UH-USF game was broadcast to the vast majority of the nation on ABC (only the far west got it on the ESPN2 mirror). The total viewer number is obtained by adding the viewers for the ABC game and the ESPN2 3:30pm reverse mirror.
http://www.sportsmediawatch.com/college-football-tv-ratings/
http://www.sportsmediawatch.com/college-football-tv-ratings/