Numbers 80,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

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80,003

[Math.]  (Sequence of  numbers 80…032 = 640…0480…09)

800032 = 6,400,480,009 = (–6+4–0+0–4+80009)2

80,005

[Math.]  (Sequence of numbers 80…052 = 640…080…025)

800052 = 6,400,800,025 = (6+4+0080002+5)2

80,186, 80,187, 80,188 & 80,286, 80,287 & 80,386, 80,387 & 80,486, 80,487

[Tech.]  Intel CPU family: 8086 (8008, 8080, 8085, 8086, 8087, 8088) and 80186 (80186/80C187, 80188, 80286/80287, 80386/80387, 80486/80487). The x87 is math co-processor. Original family: 4004 & 4040.

80,361

[Math.]  803612 = 6,457,890,321, a square number using each of 10 digits 0-9 once. (The 59th of 87 such numbers).

80,445

[Math.]  804452 = 6,471,398,025, a square number using each of 10 digits 0-9 once. (The 60th of 87 such numbers).

80,645

[Math.]  1/155 = 0.00645,161,290,322,580 =

0.00645161290,3225,80645,161290,322580 where 80,645×2 = 161,290 and 161,290×2 = 322,580.

80nnn

[Zip]  U.S. Postal Zip Code of Colorado: 80nnn-81nnn.

8nnnn

[Zip]  U.S. Postal Zip Codes of Arizona: 85nnn and 86nnn, Colorado: 80nnn and 81nnn, Idaho: 832nn and 838nn, New Mexico: 87nnn, 880nn-884nn, Nevada: 889nn and 89nnn, Utah: 84nnn, Texas: 885nn and Wyoming: 82nnn, 830nn and 831nn.