The arrival of Akpom is a big boost for manager Steve Bruce who has been keen to improve his attacking options following their relegation from the Premier League in May.
Londoner Akpom travelled to East Yorkshire on Sunday night ahead of completing his move.
The 19-year-old made headlines on Arsenal’s pre-season tour of Asia, scoring a hat-trick during the opening match against a Singapore XI.
Akpom has represented England at U20 level and spent the second half of last season on loan at Coventry City and Nottingham Forest.
He will join new arrivals Ryan Taylor, Sam Clucas and Isaac Hayden ahead of Saturday’s season-opener against Huddersfield Town
But Bruce looks like losing the services of 30-year-old N’Doye after Hull and Trabzonspor agreed a fee for the striker.
Bruce also remains hopeful of landing Odubajo’s Brentford team-mate Andre Gray in time for Saturday’s league clash.
The Tigers had a reported £4m bid for Gray rejected last week.
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