Owned byStampfigang
Description
406 406 = 2 × 7 × 29, sphenic number, 28th triangular number, centered nonagonal number,even nontotient, Narayana's cow number.
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Provenance
406 406 = 2 × 7 × 29, sphenic number, 28th triangular number, centered nonagonal number,even nontotient, Narayana's cow number.
