4030

Number
$4030$ (four thousand and thirty) is:


 * $2 \times 5 \times 13 \times 31$


 * The $3$rd weird number after $70$, $836$:
 * $\map {\sigma_1} {4030} - 4030 = 4034$: its aliquot parts are $1$, $2$, $5$, $10$, $13$, $26$, $31$, $62$, $65$, $130$, $155$, $310$, $403$, $806$, $2015$, from which $4030$ cannot be made.