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economical n.  and  super Niven n.

First numbers that belong to both sets:

1, 2, 3, 5, 7, 10, 1000, 2000, 4000, 5000, 8000, 10000, 12000, 14000, 15000, 20000, 24000, 28000, 30000, 40000, 48000, 50000, 60000, 70000, 80000, 100000, 104000, 105000, 108000, 110000, 120000, 135000, 140000, 144000, 150000, 180000, 200000, 204120, 208000, 210000, 220000, 240000, 280000, 288000, 300000, 360000, 400000, 405000, 408240, 410000, 420000, 440000, 450000, 480000, 500000, 525000, 540000, 550000, 600000, 700000, 800000, 810000, 820000, 840000, 880000, 900000, 1000000, 1000320, 1004000, 1005000, 1008000, 1010000, 1020000, 1020600, 1032000, 1040000, 1050000, 1080000, 1100000, 1104000, 1110000, 1111320, 1134000, 1140000, 1200000, 1230000, 1260000, 1320000, 1350000, 1400000, 1410000, 1440000, 1500000, 1512000, 1701000, 1800000, 2000000, 2000640, 2008000, 2010000, 2016000, 2020000, 2040000, 2041200, 2064000, 2080000, 2100000, 2112000, 2130000, 2200000, 2208000, 2220000, 2222640, 2268000, 2280000, 2400000, 2460000, 2520000, 2640000, 2800000, 2820000, 2880000, 3000000, 3024000, 3120000, 3150000, 3300000, 3333960, 3402000, 3600000, 4000000, 4010000, 4020000, 4032000, 4040000, 4050000, 4080000, 4082400, 4100000, 4200000, 4260000, 4400000, 4440000, 4500000, 4800000, 5000000, 5040000, 5050000, 5100000, 5103000, 5250000, 5400000, 5500000, 5550000, 6000000, 6048000, 6240000, 6300000, 6600000, 6804000, 7000000, 7350000, 7700000, 8000000, 8020000, 8040000, 8080000, 8100000, 8200000, 8400000, 8800000, 8880000, 9000000, 10000000, 10000040, 10003200, 10004000, 10020000, 10040000, 10044000, 10050000, 10080000, 10100000, 10101120, 10104000, 10110000, 10140000, 10200000, 10206000, 10320000, 10350000, 10400000, 10410000, 10410120, 10440000, 10500000, 10530000, 10800000, 11000000, 11010000, 11025000, 11040000, 11100000, 11112000, 11113200, 11130000, 11340000, 11400000, 11550000, 12000000, 12030000, 12101040, 12111120, 12120000, 12300000, 12600000, 13020000, 13050000, 13200000, 13230000, 13500000, 14000000, 14010000, 14040000, 14100000, 14112000, 14400000, 15000000, 15120000, 15300000, 17010000, 18000000, 20000000.