128 (number)

← 127 128 129 →
Cardinalone hundred twenty-eight
Ordinal128th
(one hundred twenty-eighth)
Factorization27
Divisors1, 2, 4, 8, 16, 32, 64, 128
Greek numeralΡΚΗ´
Roman numeralCXXVIII
Binary100000002
Ternary112023
Quaternary20004
Quinary10035
Senary3326
Octal2008
DuodecimalA812
Hexadecimal8016
Vigesimal6820
Base 363K36

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] But it is divisible by the total number of its divisors, making it a refactorable number.[3]

The sum of Euler's totient function φ(x) over the first twenty integers is 128.[4]

128 can be expressed by a combination of its digits with mathematical operators thus 128 = 28 - 1, making it a Friedman number in base 10.[5]

A hepteract has 128 vertices.

128 is the only 3-digit number that is a 7th power (27).

Other Languages
العربية: 128 (عدد)
azərbaycanca: 128 (ədəd)
تۆرکجه: ۱۲۸ (سایی)
Bân-lâm-gú: 128
български: 128 (число)
Чӑвашла: 128 (хисеп)
čeština: 128 (číslo)
Ελληνικά: 128 (αριθμός)
emiliàn e rumagnòl: 128 (nùmer)
فارسی: ۱۲۸ (عدد)
français: 128 (nombre)
Gaeilge: 128 (uimhir)
한국어: 128
հայերեն: 128 (թիվ)
italiano: 128 (numero)
magyar: 128 (szám)
македонски: 128 (број)
Bahasa Melayu: 128 (nombor)
Mìng-dĕ̤ng-ngṳ̄: 128
Nederlands: 128 (getal)
日本語: 128
norsk: 128 (tall)
oʻzbekcha/ўзбекча: 128 (son)
پښتو: ۱۲۸ (عدد)
polski: 128 (liczba)
русский: 128 (число)
Sesotho sa Leboa: 128 (nomoro)
slovenščina: 128 (število)
svenska: 128 (tal)
татарча/tatarça: 128 (сан)
ไทย: 128
українська: 128 (число)
اردو: 128 (عدد)
Vahcuengh: 128
Tiếng Việt: 128 (số)
粵語: 128
中文: 128