2,674,440

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Number

$2 \, 674 \, 440$ (two million, six hundred and seventy-four thousand, four hundred and forty) is:

$2^3 \times 3^2 \times 5 \times 17 \times 19 \times 23$

The $14$th Catalan number after $(1)$, $1$, $2$, $5$, $14$, $42$, $132$, $429$, $1430$, $4862$, $16 \, 796$, $58 \, 786$, $208 \, 012$, $742 \, 900$:

$2 \, 674 \, 440 = \dfrac 1 {14 + 1} \dbinom {2 \times 14} {14} = \dfrac 1 {15} \times 40 \, 116 \, 600$

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