28 (number)
Natural number
28 (twenty-eight) is the natural number following 27 and preceding 29. 28 is a composite number, a perfect number, a harmonic divisor number, a centered nonagonal number, a hexagonal number, a happy number, and a triangular number. 28 also appears in the Padovan sequence.
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28 (number)
Natural number
28 (twenty-eight) is the natural number following 27 and preceding 29. 28 is a composite number, a perfect number, a harmonic divisor number, a centered nonagonal number, a hexagonal number, a happy number, and a triangular number. 28 also appears in the Padovan sequence.
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sales
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Show table
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Sales history
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- Sales 7d
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- Sales 30d
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No sales yet.
Anonymous sales: no buyer or seller shown. Figures count player-to-player sales only.
From Wikipedia
28 (twenty-eight) is the natural number following 27 and preceding 29. 28 is a composite number, a perfect number, a harmonic divisor number, a centered nonagonal number, a hexagonal number, a happy number, and a triangular number. 28 also appears in the Padovan sequence. In algebraic geometry, 28 is the number of bitangents to a general plane quartic curve.
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