- Pythagorean: 2+1+9+9+7 = 28 (7th Triangular, SOD:56, PR:1
07[17 {7th Prime}] TR:406[46 {SOD:72, PR:199, TR:1081[181 {42nd Prime}]}], Perfect Number) - Simple: 2+1+18+18+25 = 64 (SR:8, SOD:127 {31st Prime}, PR:311, TR:2
080[28 {7th Triangular}])
Other Methods
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