3690

3690 = 2 x 3 x 3 x 5 x 41.

3690 is 12001200 in base 3 (A020331) and 5050 in base 9 (A020337).

3690 is the number of trees on 29 vertices with diameter 4 (A000094).

3690 is the number of 20-digit fifth powers (A216655).

3690 is a number n such that n and the square of n (13616100) use only the digits 0, 1, 3, 6, and 9 (A136850).

3690 has two representations as a sum of two squares: 3690 = 21² + 57² = 33² + 51².

3690 is a divisor of 73⁴ - 1.

Source: What's Special About This Number?