Numbers 87,000,000,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

80,000,000,00081,000,000,00082,000,000,000 – 83,000,000,00084,000,000,000

85,000,000,00086,000,000,00087,000,000,00088,000,000,00089,000,000,000

– [1B] –  [10B] –  [20B] – [30B] – [40B] – [50B] – [60B] – [70B] – [80B] – [90B] & [100B]

1  - 10 - 100  - 1000 - 10,000 - 100,000 - 1M - 10M - 100M1B10B - 100B - 1T - 10T - 100T - 1Q ...

87,178,291,200

[Math.] 14 factorial = 14! = 1×2×…×13×14 = 87,178,291,200.

87,178,291,200

[Math.]  Solutions of the factorial equations n! = abc!:

16! = 14!×5!×2! and 10! = 7!×5!×3!.

87,199,727,616

[Math.]  Sum of the first 768 cube numbers:

13+…+7683 = 87,199,727,616 = (1+…+768)2 = 295,2962.

87,654,484,225

[Math.]  Sum of the first 769 cube numbers:

13+…+7693 = 87,654,484,225 = (1+…+769)2 = 296,0652.

87,824,421,125

[Math.]  87,824,421,125 = (878+2442+1125)3 = 44453.

87,999,999,912

[Math.]

(*)   8712 = 2178×4 & 8712×2178 = 18,974,736 = 43562 (= 664)

8712…8712 = 2178…2178×4 & 8712…8712×2178…2178 = 4356…43562

(**)   87912 = 21978×4 & 21978×87912 = 1,932,129,936 = 439562

87912…87912 = 21978…21978×4 & 21978…21978×87912…87912 = 43956…439562

(***)

87999999912 = 21999999978×4 & 21999999978×87999999912 = 439999999562

87999999912…87999999912 = 21999999978…21999999978×4 &

21999999978…21999999978×87999999912…87999999912 =

= 43999999956…439999999562

(****)   879…912 = 219…978×4 & 219…978×879…912 = 439…9562

879…912…879…912 = 219…978…219…978×4 &

219...978...219...978×879...912...879...912 = 439...956...439...9562.

...

xy,zwv,abc,def

[Math.]  For any xy,zwv = 10,000 to 99,999, there are always six 6-digit numbers abc,edf such that xy,zwv +abc,def is equal to one of 6 digit-rotations of 142,857 and the number xy,zwv,abc,def is a multiple of 142,857.