2620

Number
$2620$ (two thousand, six hundred and twenty) is:
 * $2^2 \times 5 \times 131$


 * The smaller of the $3$rd amicable pair, with $2924$:
 * $\map {\sigma_1} {2620} = \map {\sigma_1} {2924} = 5544 = 2620 + 2924$