224 (other)
224 may refer to: *The year 224 *The number 224 - see 224 (number) *The area code 224 - see Area codes 847 and 224 *2-2-4 The hyphen-minus is the most commonly used type of hyphen, widely used in digital documents. It is the only character that looks like a minus sign or a dash in many character sets such as ASCII or on most keyboards, so it is also used as such. ...

224 (number)
224 (two hundred ndtwenty-four) is the natural number following 223 and preceding 225. In mathematics 224 is a practical number, and a sum of two positive cubes . It is also , making it one of the smallest numbers to be the sum of distinct positive cubes in more than one way. 224 is the smallest ''k'' with λ(''k'') = 24, where λ(''k'') is the Carmichael function. The mathematician and philosopher Alex Bellos suggested in 2014 that a candidate for the lowest uninteresting number would be 224 because it was, at the time, "the lowest number not to have its own page on he English-language version ofWikipedia". In other areas In the SHA-2 family of six cryptographic hash functions, the weakest is SHA-224, named because it produces 224-bit hash values. It was defined in this way so that the number of bits of security it provides (half of its output length, 112 bits) would match the key length of two-key Triple DES. The ancient Phoenician shekel was a standardized measure of ...
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Area Codes 847 And 224
Area codes 847 and 224 are telephone area codes in the North American Numbering Plan (NANP) for the U.S. state of Illinois. The numbering plan area (NPA) comprises the northeastern part of Illinois and many northern suburbs of Chicago. This includes most of Lake County, the northern part of Cook County, the northern part of Kane County, and a small part of McHenry County. Area code 847 was created on January 20, 1996, in a three-way split of area code 708. Within only five years, 847 was already close to exhaustion from the rapid growth in telecommunication services in the Chicago suburbs and the proliferation of cell phones and pagers. On January 5, 2002, area code 224 was assigned to overlay area code 847. This required ten-digit dialing in all affected communities. Service area *Algonquin *Antioch * Arlington Heights *Bannockburn * Barrington *Barrington Hills * Beach Park *Buffalo Grove *Burlington * Carpentersville *Cary * Channel Lake * Deerfield * Deer Park *Des Plain ...
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