440

[Library]  ISBN-0-440 is the International Standard Book Number for books published by Dell Publishing (of Random House).

 

[Music]  The frequency (Hz, Hertz) of the musical note A (La), above the middle C (Sol): A4 = 440 Hz.

 A0 = 27.5 Hz, A1 = 55 Hz, A2 = 110 Hz, A3 = 220 Hz, A4 = 440 Hz, A5 = 880 Hz, A6 = 1760 Hz,  A7 = 3520 Hz, A8 = 7040 Hz, A9 = 14,080 Hz and A10 = 28,160 Hz.

 

[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])

 

[Tech.]  Volvo’s numbered series: 140 (142, 144, 145), 164, 240 (242, 244, 245), 260 (262, 264, 265), 340 (343, 345), 360, 440, 460, 480, 740, 760, 780, 850, 940 and 960. Digit 0 is replaced by the number of doors

 

[World]  The ISO-3166 country code for Lithuania.

 

441

[Library]  ISBN-0-441 is the International Standard Book Number for books published by Ace Books (Berkeley Books).

 

[Math.]  Sum of the first 6 cube numbers: 13+23+33+43+53+63 = 441 = (1+2+3+4+5+6)2.

 

[Math.]  Reversible numbers and their squares: 122 = 144 and 212 = 441. Also: 1022 = 10404, 1202 = 14400, 2012 = 40401 and 2102 = 44100.

 

[Math.]  63504 = 441×144 = 2522.

 

[Phone]  The telephone area code for Bermuda.

 

442

[Library]  ISBN-0-442 is the International Standard Book Number for books published by Van Nostrand Reinhold (International Thomson Publishing Inc.).

 

[Sport]  One of soccer’s possible lineup tactics formations: 4-4-2 (4 defenders, 4 midfielders and 2 forwards). A slightly modified defenders line makes: 1-3-4-2 (1 sweeper), or 3-1-4-2 (1 stopper). A slightly modified forwards line makes: 4-4-1-1 (1 striker).

 

[World]  The ISO-3166 country code for Luxembourg.

 

443

[Math.]  A prime number.

 

[Math.]  Square of numbers of similar pattern xxy, where y = x–1.

1102 = 012,100 & 012+100 = 112 = 110+2.

3322 = 110,224 & 110+224 = 334 = 332+2.

Similarly, 3…322 = 1…102…24 & 1…10+2…24 = 3…34 = 3…32+2.

4432 = 196,249 & 196+249 = 445 = 443+2

6652 = 442,225 & 442+225 = 667 = 665+2.

Similarly, 6…652 = 4…422…25 & 4…42+2…25 = 6…67 = 6…65+2.

7762 = 602,176 & 602+176 = 778 = 776+2

 

444

[Library]  ISBN-0-444 is the International Standard Book Number for books published by North-Holland.

 

[Math.]  444 = (41+41+41)+(42+42+42)+(43+43+43)+(43+43+43).

 

[Math.]  All 3 numbers 1,999,899, 1,999,900 and 1,999,901 have all their 404th, 414th, 424th, 434th, 444th and 454th powers starting with digits 404, 414, 424, 434, 444 and 454, respectively.

 

[Math.]  All numbers in the range [19,998,989-19,999,012] have all their 404th, 414th, 424th, 434th, 444th and 454th powers starting with digits 404, 414, 424, 434, 444 and 454, respectively.

 

[Phone]  The number to key in text messaging on telephone keypad for letter I.

 

[World]  The Iranian Islamic fundamentalists seized the U.S. Embassy in Tehran in 1979 and held Americans hostage for 444 days.

 

445

[Math.]  Numbers of the same pattern, xxy, where y = x +1: 1122 = 012,544 & 012+544 = 556 & 5562 = 309,136 & 309+136 = 445 & 4452 = 198,025 & 198+025 = 223 & 2232 = 049,729 & 049+729 = 778 & 7782 = 605,284 & 605+284 = 889 & 8892 = 790,321 & 790+321 = 1111. Also: 3342 = 111556 & 111+556 = 667.

 

[Sport]  The standard weight of a FIFA-approved soccer ball: 420-445 grams.

 

446

[Library]  ISBN-0-446 is the International Standard Book Number for books published by Warner Books.

 

[World]  The ISO-3166 country code for Macao.

 

447...


   448…

 

449

[Library]  ISBN-0-449 is the International Standard Book Number for books published by Fawcett Columbine, Fawcett Premier (of Random House).

 

[Math.]  A prime number. 

 

440-449

[Library]  Numbers 400-499 are the first 3 digits in Dewey Decimal Classification System call numbers for library books in Languages and Linguistics. Numbers 440-449 are for books in French. 

 

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