128 (one hundred [and] twenty-eight) is the
natural number following
127 and preceding
129.
In mathematics
128 is the seventh power of 2. It is the largest number which cannot be expressed as the sum of any number of distinct
squares.[1][2] However, it is divisible by the total number of its divisors, making it a
refactorable number.[3]
128 is the only 3-digit number that is a 7th power (27).
In bar codes
Code 128 is a Uniform Symbology Specification (USS Code 128) alphanumeric bar code that encodes text, numbers, numerous functions, and designed to encode all 128 ASCII characters (ASCII 0 to ASCII 127), as used in the shipping industry.
Subdivisions include:
128A (0–9, A–Z, ASCII control codes, special characters)
ASCII includes definitions for 128
characters (33 non-printing characters, mostly obsolete
control characters that affect how text is processed, and 94 printable)
A 128-bit integer can represent up to 3.40282366...e+38 values (2128= 340,282,366,920,938,463,463,374,607,431,768,211,456).
RIVA 128 (Real-time Interactive Video and Animation accelerator), one of the first consumer graphics chips to integrate 3D and video acceleration in 1997
^OEIS:A001422. Similarly, the largest numbers that cannot be expressed as sums of distinct cubes and fourth powers, respectively, are 12758 and 5134240 (sequence A001661 in the
OEIS).