1408

Number
$1408$ (one thousand, four hundred and eight) is:


 * $2^7 \times 11$


 * The $22$nd octagonal number, after $1$, $8$, $21$, $40$, $65$, $\ldots$, $645$, $736$, $833$, $936$, $1045$, $1160$, $1281$:
 * $1408 = \displaystyle \sum_{k \mathop = 1}^{22} \left({6 k - 5}\right) = 22 \left({3 \times 22 - 2}\right)$