572

Number
$572$ (five hundred and seventy-two) is:


 * $2^2 \times 11 \times 13$


 * The $10$th primitive abundant number after $20$, $70$, $88$, $104$, $272$, $304$, $368$, $464$, $550$:
 * $1 + 2 + 4 + 11 + 13 + 22 + 26 + 44 + 52 + 143 + 286 = 604 > 572$


 * The $14$th primitive semiperfect number after $6$, $20$, $28$, $88$, $104$, $272$, $304$, $350$, $368$, $464$, $490$, $496$, $550$:
 * $572 = 1 + 11 + 13 + 22 + 44 + 52 + 143 + 286$