Numbers 420,000,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

 400,000,000 410,000,000420,000,000430,000,000  – 440,000,000

  All Numbers  450,000,000460,000,000470,000,000480,000,000 –  490,000,000

[1M] & [10M] & [100M- [200M] - [300M] - [400M] - [500M] - [600M] - [700M] - [800M] - [900M]  & [1B]

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

420,373,009

[Math.] Sum of the first 202 cube numbers:

13+23+…+2023 = 420,373,009 = (1+2+…+202)2 = 20,5032.

 

420,783,169

[Math.] 205132 = 420,783,169, a square using all 9 digits 0-9 once, except digit 5.

 

428,738,436

[Math.] Sum of the first 203 cube numbers:

13+23+…+2033 = 428,738,436 = (1+2+…+203)2 = 20,7062.


xyz,abc,def

[Math.]  For any xyz = 100 to 999, there are always six 6-digit numbers abc,edf such that the sum (xyz+abc,def) is equal to one of 6 digit-rotations of 142,857 and the number  xyz,abc,def is a multiple of 142,857.

 

For any xyz = 100 to 999, there are always twelve 6-digit numbers abc,edf such that the sum (xyz+abc,def) is equal to one of 12 digit-rotations of 076,923 or 153,846 and the number xyz,abc,def is a multiple of 76,923.