88 (number)
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88 is a natural number that follows 87 and precedes 89. It is an even number and is twice 44. In base 10, it consists of two digits, both the numeral 8.
When factored, 88 has divisors of 1, 2, 4, 8, 11, 22, 44, and 88. Its prime factorization is 2 × 2 × 2 × 11, written as 2³ × 11.
Mathematical properties
88 is a palindrome when read in base 10. It is also a composite number, the product of 8 × 11. The sum of its proper divisors—those other than itself—is 92, which is greater than 88; it is therefore classified as an abundant number, one whose divisors sum to more than the number itself.
Notation and other systems
In Roman numerals, 88 is written as LXXXVIII, which uses the most letters of any numeral below 100 when compared with others. In binary, 88 is 1011000.
Common uses
88 appears in various scientific and cultural contexts: for example, a standard piano has 88 keys, and astronomers use a system of 88 constellations recognized worldwide by the International Astronomical Union. In certain East Asian cultures, 8 is regarded as an auspicious number, which gives 88 particular significance in business and advertising.