A further 2.3 million tickets for London 2012 are to go on sale next Friday.
The tickets, for people who were unsuccessful in the initial ballot, will go on sale at 6am on 24 June on a first come, first served basis.
Of these, 1.7m are for football and 600,000 for other sports, including archery and hockey.
Nearly two-thirds of applicants – about 1.2m out of 1.9 m – missed out on tickets first time.
The London 2012 chairman, Lord Coe, said: "It has been a massive demand which has created huge disappointment. I would be hard pushed to see such a demand for any sports event in my lifetime."
Organisers were "absolutely determined" to get tickets to those who had missed out, he added.
Tickets are still available for 310 sessions, 44 of which are medal events including archery, basketball, fencing, judo, synchronised swimming and table tennis.