88

88 (eighty-eight) is the natural number following 87 and preceding 89. In mathematics 88 is: a refactorable number. a primitive semiperfect number. an untouchable number. a hexadecagonal number. an Erdős–Woods number, since it is possible to find sequences of 88 consecutive integers such that each inner member shares a factor with either the first or the last member. a palindromic number in bases 5 (3235), 10 (8810), 21 (4421), and 43 (2243). a repdigit in bases 10, 21 and 43. a 2-automorphic number. the smallest positive integer with a Zeckendorf representation requiring 5 Fibonacci numbers. a strobogrammatic number. the largest number in English not containing the letter 'n' in its name, when using short scale. 88 and 945 are the smallest coprime abundant numbers. In science and technology The atomic number of the element radium. The number of constellations in the sky as defined by the International Astronomical Union. Messier object M88, a magnitude 11.0 spiral galaxy in the constellation Coma Berenices. The New General Catalogue object NGC 88, a spiral galaxy in the constellation Phoenix, and a member of Robert's Quartet. Space Shuttle Mission 88 (STS-88), launched and completed in December 1998, began the construction of the International Space Station. Approximately the number of days it takes Mercury to complete its orbit.