Search a number
abundant n.  and  centered nonagonal n.

First numbers that belong to both sets:

820, 1540, 2080, 3160, 6328, 9730, 12880, 15400, 17020, 19900, 21736, 24310, 24976, 29890, 30628, 33670, 39340, 43660, 46360, 51040, 53956, 57970, 58996, 62128, 66430, 76636, 80200, 86320, 90100, 96580, 100576, 113050, 123256, 130816, 135460, 143380, 148240, 156520, 168490, 177310, 184528, 190036, 205120, 214840, 220780, 230860, 237016, 245350, 247456, 255970, 264628, 271216, 289180, 300700, 307720, 319600, 346528, 349030, 359128, 387640, 400960, 409060, 422740, 431056, 445096, 453628, 479710, 491536, 500500, 515620, 524800, 540280, 565516, 575128, 588070, 591328, 604450, 627760, 644680, 654940, 672220, 682696, 700336, 714610, 725410, 739936, 758296, 769420, 788140, 799480, 818560, 830116, 845650, 861328, 865270, 893116, 913276, 925480, 946000, 958420, 979300, 991936, 1008910, 1030330, 1043290, 1060696, 1082656, 1095940, 1118260, 1131760, 1154440, 1186570, 1228528, 1280800, 1304920, 1319500, 1343980, 1358776, 1378630, 1383616, 1398628, 1423828, 1480060, 1505980, 1521640, 1547920, 1563796, 1606528, 1628110, 1633528, 1655290, 1693720, 1721440, 1738180, 1766260, 1811656, 1851850, 1875016, 1880830, 1921780, 1951300, 1969120, 1999000, 2017036, 2047276, 2065528, 2071630, 2089990, 2096128, 2114596, 2145556, 2164240, 2195560, 2214460, 2246140, 2265256, 2323090, 2368576, 2401336, 2421100, 2454220, 2474200, 2507680, 2554930, 2588950, 2616328, 2636956, 2643850, 2692360, 2727280, 2748340, 2783620, 2804896, 2833390, 2898028, 2926990, 2956096, 2978020, 3014740, 3036880, 3073960, 3156328, 3194128, 3278080, 3316600, 3339820, 3378700, 3441376, 3465028, 3536470, 3592540, 3632860, 3657160, 3689686, 3697840, 3763396, 3788128, 3796390, 3821230, 3862810, 3921400, 3963520, 3988900, 4031380, 4056976, 4091230, 4099816, 4125628, 4160170, 4203550, 4238416, 4264660, 4308580, 4335040, 4379320, 4405996, 4477528, 4486510, 4522528, 4549636, 4594996, 4622320, 4668040, 4695580, 4741660, 4806550, 4815856, 4853170, 4881250, 4890628, 4918816, 4994380, 5041900, 5070520, 5118400, 5185810, 5195476, 5224528, 5273128, 5380840, 5430160, 5459860, 5509540, 5539456, 5589496, 5619628, 5670028, 5700376, 5710510, 5751136, 5781700, 5832820, 5863600, 5915080, 6029128, 6039550, 6070870, 6081328, 6112756, 6123250, 6196960, 6249880, 6281740, 6335020, 6420736, 6496210, 6550390, 6626620, 6681340, 6714280, 6769360, 6802516, 6857956, 6891328, 6935950, 6991930, 7036876, 7070680, 7115878, 7127200.

Some larger examples :