👉 In mathematics, an "imperfect" or "non-identical" number is a number that has two different representations as integers. This means that it cannot be expressed as a multiple of another integer without having some digits repeated. For example: 123 = 3 × 45 890 = 7 × 90 These numbers are considered imperfect because they can't be represented exactly as integers with the same number of digits. In other words, an "im
