98 (number)
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98 is a natural number that follows 97 and precedes 99. It is a composite number, meaning it has factors other than 1 and itself.
In the standard Hindu-Arabic numeral system used worldwide, 98 is written with two digits: 9 representing the tens place and 8 representing the ones place. In Roman numerals it is written XCVIII.
Mathematical properties
98 is an even number, since it is divisible by 2. Its prime factorization is 2 × 7 × 7, or 2 × 7². Its proper divisors are 1, 2, 7, 14, 49, and 98. The sum of its proper divisors is 73, making 98 a deficient number.
98 is twice a perfect square equal to 2 × 7², so the square root of 98 is 7√2, approximately 9.899. It is also the sum of two perfect squares: 49 + 49.
General use
98 is used as a reference to percentages, for example in describing safety or quality standards in industry and healthcare. It is also used in abbreviated year notation (for instance '98' to mean 1998), and in road numbers and communication codes in various countries.