28 (number)

Cardinaltwenty-eightOrdinal28th
(twenty-eighth)Factorization2 × 7Divisors1, 2, 4, 7, 14, 28Greek numeralΚΗ´Roman numeralXXVIII, xxviiiBinary11100₂Ternary1001₃Senary44₆Octal34₈Duodecimal24₁₂Hexadecimal1C₁₆

28 (twenty-eight) is the natural number following 27 and preceding 29.