736

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