6930
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Number
$6930$ (six thousand, nine hundred and thirty) is:
- $2 \times 3^2 \times 5 \times 7 \times 11$
- The $27$th square pyramidal number after $1$, $5$, $14$, $30$, $55$, $\ldots$, $1015$, $1240$, $1496$, $1785$, $2109$, $2470$, $2870$, $3311$, $3795$, $4324$, $4900$, $5525$, $6201$:
- $6930 = \ds \sum_{k \mathop = 1}^{27} k^2 = \dfrac {27 \paren {27 + 1} \paren {2 \times 27 + 1} } 6$