720

720 = 2⁴ x 3² x 5.

720 is the smallest number with 30 divisors.

720 has a representation as a sum of two squares: 720 = 12² + 24².

720 = 6! It is the largest factorial to contain all different digits.

720 is the smallest number n where either n or n + 1 is divisible by the numbers from 1 to 10.

The epic poem Beowulf was composed in the year 720.

Source: Number Gossip