380

Number
$380$ (three hundred and eighty) is:


 * $2^2 \times 5 \times 19$


 * The $19$th integer after $7, 13, 19, 35, 38, 41, 57, 65, 70, 125, 130, 190, 205, 223, 253, 285, 305, 350$ the decimal representation of whose square can be split into two parts which are each themselves square:
 * $380^2 = 144 \, 400; 144 = 12^2, 400 = 20^2$