4324
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Number
$4324$ (four thousand, three hundred and twenty-four) is:
- $2^2 \times 23 \times 47$
- The $23$rd square pyramidal number after $1$, $5$, $14$, $30$, $55$, $\ldots$, $1015$, $1240$, $1496$, $1785$, $2109$, $2470$, $2870$, $3311$, $3795$:
- $4324 = \ds \sum_{k \mathop = 1}^{23} k^2 = \dfrac {23 \paren {23 + 1} \paren {2 \times 23 + 1} } 6$