A page of the Numeropedia - the Special Encyclopedia of Numbers
[Tech.] The “number system” code of an EAN-13 barcode for Yugoslavia’s products.
[World] The ISO country code for Uzbekistan. (ISO-3166).
[Math.] A triangular number (sum of all integers from 1 to 41): 861 = 1+2+…+40+41.
[Math.] 144,648 = 861×168 = 492×294.
[World] The ISO country code for Venezuela. (ISO-3166).
[Math.] A prime number.
[Tech.] The longer side (mm, millimeters) of the U.S. standard paper of size D, for technical drawing, 864 mm×559 mm. It is half of size E, 1118 mm×864 mm.
[Phone] An area code for the toll-free (or WATS: Wide Area Telecommunications Service) telephone number, dialing within the U.S. and Canada. Besides the original number 800, there are: 888, 877, 866 and 855 and will be 844, 833 and 822.
[Phone] The telephone area code for Trinidad and Tobago (within NANPA/U.S.) NANPA: North American Numbering Plan Administration.
[Phone] The telephone area code for St. Kitts and Nevis (within NANPA/U.S.). NANPA: North American Numbering Plan Administration.
[Tech.] The “number system” code of an EAN-13 barcode for Turkey’s products.
[Library] Numbers 800-899 are the first 3 digits in Dewey Decimal Classification System call numbers for library books in Literature. Numbers 860-869 are for books in Spanish and Portuguese Literatures.