1728

Number
$1728$ (one thousand, seven hundred and twenty-eight) is:


 * $2^6 \times 3^3$


 * The $12$th cube number after $1$, $8$, $27$, $64$, $125$, $216$, $343$, $512$, $729$, $1000$, $1331$:
 * $1728 = 12 \times 12 \times 12 = \left({2^2 \times 3}\right)^3$


 * Hence in duodecimal notation:
 * $1000$