Search a number
apocalyptic n.  and  practical n.

First numbers that belong to both sets:

192, 220, 224, 312, 384, 390, 528, 540, 580, 612, 620, 624, 648, 660, 666, 684, 700, 702, 704, 714, 720, 800, 820, 828, 840, 864, 868, 882, 920, 924, 928, 972, 1026, 1040, 1056, 1080, 1088, 1092, 1128, 1140, 1160, 1170, 1200, 1224, 1230, 1232, 1240, 1272, 1280, 1290, 1312, 1316, 1372, 1416, 1452, 1464, 1470, 1472, 1480, 1482, 1488, 1560, 1568, 1584, 1590, 1596, 1638, 1640, 1656, 1674, 1692, 1722, 1760, 1776, 1792, 1800, 1806, 1820, 1860, 1880, 1914, 1944, 1968, 1980, 2000, 2024, 2052, 2064, 2070, 2072, 2120, 2130, 2160, 2200, 2214, 2226, 2240, 2250, 2262, 2296, 2300, 2304, 2310, 2320, 2322, 2340, 2352, 2360, 2368, 2430, 2432, 2448, 2460, 2464, 2500, 2548, 2550, 2552, 2574, 2576, 2604, 2610, 2624, 2628, 2632, 2646, 2680, 2700, 2704, 2728, 2730, 2736, 2760, 2808, 2814, 2816, 2820, 2844, 2860, 2862, 2880, 2898, 2900, 2912, 2928, 2940, 2952, 2960, 2964, 2982, 2988, 2992, 3000, 3008, 3016, 3024, 3040, 3042, 3072, 3078, 3080, 3096, 3100, 3108, 3120, 3132, 3150, 3160, 3186, 3192, 3248, 3256, 3276, 3280, 3294, 3300, 3304, 3312, 3318, 3320, 3330, 3332, 3348, 3354, 3366, 3380, 3384, 3388, 3392, 3400, 3402, 3416, 3432, 3444, 3480, 3486, 3500, 3504, 3520, 3528, 3536, 3540, 3552, 3588, 3608, 3612, 3630, 3648, 3654, 3672, 3680, 3690, 3696, 3712, 3738, 3740, 3744, 3750, 3752, 3762, 3776, 3784, 3800, 3808, 3816, 3828, 3840, 3864, 3872, 3876, 3888, 3894, 3900, 3904, 3906, 3920, 3936, 3942, 3948, 3952, 3960, 3968, 3976, 3978, 3996, 4000, 4020, 4048, 4056, 4060, 4074, 4080, 4088, 4092, 4100, 4128, 4134, 4136, 4140, 4144, 4176, 4180, 4200, 4212, 4240, 4256, 4260, 4264, 4272, 4284, 4290, 4300, 4312, 4320, 4340, 4350, 4352, 4368, 4392, 4410.

Some larger examples :