7200

Number
$7200$ (seven thousand, two hundred) is:


 * $2^5 \times 3^2 \times 5^2$


 * The $24$th pentagonal pyramidal number after $1, 6, 12, 40, 75, \ldots, 1470, 1800, 2176, 2601, 3078, 3610, 4200, 4851, 5566, 6348$:
 * $7200 = \displaystyle \sum_{k \mathop = 1}^{24} \dfrac {k \left({3 k - 1}\right)} 2 = \dfrac {24^2 \left({24 + 1}\right)} 2$