1976

Number
$1976$ (one thousand, nine hundred and seventy-six) is:


 * $2^3 \times 13 \times 19$


 * The $26$th octagonal number, after $1$, $8$, $21$, $40$, $65$, $\ldots$, $645$, $736$, $833$, $936$, $1045$, $1160$, $1281$, $1408$, $1541$, $1680$, $1825$:
 * $1976 = \displaystyle \sum_{k \mathop = 1}^{26} \left({6 k - 5}\right) = 26 \left({3 \times 26 - 2}\right)$