4900

Number
$4900$ (four thousand nine hundred) is:


 * $2^2 \times 5^2 \times 7^2$


 * The $70$th square number after $1$, $4$, $9$, $16$, $25$, $36$, $\ldots$, $4096$, $4225$, $4356$, $4489$, $4624$, $4761$:
 * $4900 = 70 \times 70$


 * The $24$th square pyramidal number:
 * $4900 = 1^2 + 2^2 + \cdots + 24^2$


 * The $9$th square whose decimal representation can be split into two parts which are each themselves square:
 * $4900 = 70^2$; $4 = 2^2$, $900 = 30^2$