380

[Library]  ISBN-0-380 is the International Standard Book Number for books published by Avon Books.

 

[Phone]  International telephone dialing code for Ukraine.

 

[Tech.]  A family of passenger airplane/jetliner Airbus: A-300 (and shorter variant A-310), A-320, (shorter variants A-318, A-319 and stretched variant A-321), A-330, A-340, A-350 and A-380 (as of 2006).

 

[World]  The ISO country code for Italy. (ISO-3166)

 

381

[Phone]  International telephone dialing code for Serbia and Montenegro (formerly, Yugoslavia).

 

382

 

383

[Calendar]  The number of full days in a Chinese lunar (or lunisolar) leap year (or intercalary year): 383, 384 or 385.

 

[Math.]  A palindromic prime number.  The smallest Sophie Germaine prime number, which is palindromic. Both 191 and twice of it plus 1 (383) are palindromic prime numbers.

 

[Math.]  The 3rd Woodall prime number: 6´26–1 = 383.

The first Woodall prime numbers (of the form n´2n–1) are with n = 2, 3, 6, 30, 75, 81…

 

384 & 385

[Calendar]  The number of full days in a Chinese lunar (or lunisolar) leap year (or intercalary year): 383, 384 or 385. The number of full days in a Buddhist calendar year: 354, 355, 384, or 385.

 

384

[Math.]  Sum 192+384 = 576 is one of only 4 cases that the equality: n+2n = 3n use each of 9 digits 1-9 once: n = 192, 219, 273 and 327.

 

[Math.]  185,472 = 672×276 = 384×483.

 

[Sport]  The number of dimples on a golf ball usually are: 252, 286, 332, 336, 360, 384, 392, 410, 416, 420, 422, 432, 440, 480, 492 or 500. (References [6])

 

[World]  The ISO country code for Ivory Coast (Cote d’Ivoire). (ISO-3166)

 

[Tech.]  The hash functions recommended/approved by NIST to replace SHA-1, which outputs 160 bits hash: SHA-512, SHA-384, SHA-256 and SHA-224. All 3-digit number indicates the number of output bits.

 

385

[Library]  ISBN-0-385 is the International Standard Book Number for books published by Anchor Books or Doubleday (of Bantam Doubleday Dell Publishing Group)

 

 [Math.]  A pyramidal number (sum of all squares of integers from 1 to 10): 385 = 12+22+32+42+52+62+72+82+92+102.

 

[Phone]  International telephone dialing code for Croatia.

 

[Sport]  The distance (26 miles plus 385 yards) of the standardized marathon race in the 1924 Olympic Games (Paris, France), to be the length first run during the 1908 Olympic Games (London, England). It is not an even distance in either miles or kilometers (42.195 km). The distance of the first marathon race is even 40 km at the first modern 1896 Olympic Games (Athens, Greece).

 

386

[Phone]  International telephone dialing code for Slovenia.

 

386

[Tech.]  Intel’s popular 386 (or 80386) CPU in the family of x86.

 

387

[Library]  ISBN-0-387 is the International Standard Book Number for books published by Springer-Verlag New York.

 

[Phone]  International telephone dialing code for Bosnia and Herzegovina.

 

388 

[World]  The ISO country code for Jamaica. (ISO-3166)

 

389

[Math.]  A prime number.

 

[Phone]  International telephone dialing code for Fyrom and Macedonia.

 

380-389

[Library]  Numbers 300-399 are the first 3 digits in Dewey Decimal Classification System call numbers for library books in Social Sciences (Economics, Government and Education…). Numbers 380-389 are for books in Transportation, Communications and Commerce.

 

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References [6]: Scientific American, I. Stewart, Mathematical Recreations, February 1997.