736 = 25 x 23.
736 has a unique representation as a sum of three squares: 736 = 42 + 122 + 242.
736 has the representation 36 + 7.
736 is an octagonal number. It is also a centered heptagonal number.
736 is the smallest number such that n and 2n end with the same three digits.
The Revox G36 (or 736 in Great Britain) was a mono/stereo reel-to-reel recording machine.
Source: Number Gossip