4060

Number
$4060$ (four thousand and sixty) is:


 * $2^2 \times 5 \times 7 \times 29$


 * The $28$th tetrahedral number, after $1$, $4$, $10$, $20$, $35$, $\ldots$, $816$, $969$, $1140$, $1330$, $1540$, $1771$, $2024$, $2300$, $2600$, $2925$, $3276$, $3276$:
 * $4060 = \ds \sum_{k \mathop = 1}^{28} \frac {k \paren {k + 1} } 2 = \dfrac {28 \paren {28 + 1} \paren {28 + 2} } 6$