Numbers 640,000,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

All Numbers  600,000,000 610,000,000620,000,000630,000,000 – 640,000,000

650,000,000660,000,000670,000,000680,000,000690,000,000

[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 ...

641,975,308

[Math.]  Multiples of 012345679 by 7, 16, 25, 34, 43, 52, 61, 70 and 79 will yield all 9 rotations of 086419753: 086419753, 197530864, 308641975, 419753086, 530864197, 641975308, 753086419, 864197530 and 975308641. All numbers are missing digit 2.

 

643,187,952 

[Math.] (References [1])

Pan-digital number

2× a zero-less

pan-digital number

Uses each of

9 digits 1-9 once

1,037,246,958

= 2×518,623,479

= 9×57,624,831

1,046,389,752

= 2×523,194,876

= 9×58,132,764

1,286,375,904

= 2×643,187,952

= 9×71,465,328

1,307,624,958

= 2×653,812,479

= 9×72,645,831

1,370,258,694

= 2×685,129,347

= 9×76,125,483

1,462,938,570

= 2×731,469,285

= 9×81,274,365

 

 646,430,625

[Math.] Sum of the first 225 cube numbers:

13+23+…+2253 = 646,430,625 = (1+2+…+225)2 = 25,4252. 

 

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.