624

624 = 2 x 2 x 2 x 2 x 3 x 13.

624 is 4444 in base 5. It is 1551 in base 7.

624 is the smallest number with the property that its first five multiples (624, 1248, 1872, 2496, 3120) contain the digit 2.

624 is the sum of twin primes: 624 = 311 + 313.

624 Hektor is the largest of the Jupiter Trojan asteroids.

Source: What's Special About This Number?