1404

Number
$1404$ (one thousand, four hundred and four) is:
 * $2^2 \times 3^3 \times 13$


 * The $24$th heptagonal number after $1, 7, 18, 34, 55, 81, 112, \ldots, 874, 970, 1071, 1177, 1288$:
 * $1404 = \displaystyle \sum_{k \mathop = 1}^{24} \left({5 k - 4}\right) = \dfrac {24 \left({5 \times 24 - 3}\right)} 2$