28 (twenty-eight) is a positive integer following 27 and preceding 29. Its ordinal form is written "28th" or "twenty-eighth".

Properties

28-0.png

In googology

In Greek-based number-naming systems, 28 is associated with prefix "octoicosa-", and with prefix "octoviginti-" in Latin systems.

Sources

  1. MathWorld, Perfect Number
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