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apocalyptic n.  and  tau n.

First numbers that belong to both sets:

384, 564, 612, 664, 684, 720, 824, 828, 864, 882, 972, 1040, 1056, 1164, 1192, 1200, 1212, 1224, 1304, 1384, 1432, 1524, 1572, 1644, 1656, 1688, 1692, 1784, 1800, 1812, 1864, 1884, 1912, 1944, 1980, 2000, 2004, 2008, 2025, 2076, 2148, 2160, 2168, 2216, 2240, 2292, 2316, 2320, 2340, 2344, 2364, 2388, 2432, 2532, 2628, 2676, 2700, 2724, 2748, 2792, 2824, 2844, 2868, 2872, 2936, 2952, 2960, 2984, 2988, 3012, 3032, 3042, 3064, 3084, 3096, 3112, 3120, 3208, 3228, 3249, 3272, 3276, 3280, 3324, 3352, 3368, 3384, 3448, 3492, 3512, 3516, 3528, 3552, 3592, 3656, 3684, 3688, 3708, 3712, 3732, 3736, 3744, 3756, 3804, 3816, 3832, 3896, 3924, 3928, 3936, 3968, 3992, 4044, 4056, 4072, 4080, 4128, 4140, 4164, 4184, 4240, 4284, 4308, 4320, 4376, 4392, 4456, 4476, 4504, 4512, 4548, 4552, 4568, 4572, 4596, 4616, 4668, 4716, 4720, 4736, 4744, 4761, 4764, 4788, 4792, 4808, 4812, 4856, 4880, 4896, 4904, 4952, 5028, 5048, 5052, 5088, 5112, 5128, 5144, 5148, 5172, 5176, 5196, 5202, 5224, 5248, 5256, 5268, 5272, 5280, 5288, 5364, 5384, 5388, 5416, 5436, 5464, 5484, 5504, 5520, 5532, 5580, 5604, 5608, 5625, 5672, 5680, 5688, 5748, 5752, 5796, 5816, 5824, 5844, 5856, 5864, 5868, 5912, 5976, 5988, 6000, 6008, 6012, 6016, 6036, 6056, 6088, 6108, 6144, 6160, 6228, 6276, 6320, 6376, 6408, 6432, 6444, 6472, 6488, 6492, 6498, 6516, 6561, 6564, 6568, 6584, 6616, 6624, 6632, 6640, 6720, 6732, 6756, 6784, 6804, 6816, 6824, 6828, 6856, 6872, 6904, 6912, 6924, 6936, 6960, 6984, 7008, 7016, 7064, 7092, 7116, 7120, 7164, 7212, 7256, 7272, 7280, 7284, 7288, 7296, 7308, 7352, 7380, 7392, 7404, 7416, 7428, 7432, 7440, 7496, 7500, 7524, 7528, 7552, 7569, 7572, 7576, 7584, 7596, 7616.

Some larger examples :