360

Number
$360$ (three hundred and sixty) is:
 * $2^3 \times 3^2 \times 5$


 * The $1$st number whose ratio to aliquot sum is $4 : 9$:
 * $\dfrac {\sigma \left({360}\right) - 360} {360} = \dfrac 9 4$
 * where $\sigma$ denotes the $\sigma$ (sigma) function.


 * The $\sigma$ (sigma) value of $120$:
 * $\sigma \left({120}\right) = 360 = 3 \times 120$

Also see

 * Ratio of 360 to Aliquot Sum
 * $\sigma$ of $120$