4879

Number
$4879$ (four thousand, eight hundred and seventy-nine) is:


 * $7 \times 17 \times 41$


 * The $11$th Kaprekar number after $1, 9, 45, 55, 99, 297, 703, 999, 2223, 2728$:
 * $4879^2 = 23 \, 804 \, 641 \to 238 + 04641 = 4879$