3700

3700 = 2 x 2 x 5 x 5 x 37.

3700 is the sum of the squares of four consecutive primes (A133524).

3700 is divisible by the sum of the cubes of its digits (A034088).

3700 and the sum of its digits are both multiples of 10 (A218292).

3700 is 12002001 in base 3.

3700 has three representations as a sum of two squares (A025286 and A025304 and A000443): 3700 = 10² + 60² = 28² + 54² = 42² + 44².

3700 divides 43⁴ - 1.

Source: What's Special About This Number?