Numbers 68,000,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

60,000,000 61,000,00062,000,00063,000,000 – 64,000,000

65,000,00066,000,00067,000,00068,000,00069,000,000

All Numbers  & [1M] & [10M- [20M] - [30M] - [40M] - [50M] - [60M] - [70M] - [80M] - [90M]  &  [100M]

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68,161,536

[Math.]  Sum of the first 128 cube numbers:

13+23+…+1273+1283 = 68,161,536 = (1+2+…+127+128)2 = 82562.

 

68,574,961

[Math.]  68,574,961 = (6+8+57+4+9+6+1)4 = 914.

 

68,574,961

[Math.]  (1+2+…+13)4 = [(15+25+…+135)+(17+27+…+137)]/2.

 

68,891,992

[Math.]  A pair of amicable numbers (68891992, 78437288). 

 

xy,abc,def

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

 

For any xy = 10 to 99, there are always twelve 6-digit numbers abc,edf such that the sum (xy+abc,def) is equal to one of 12 digit-rotations of 076,923 or 153,846 and the number xy,abc,def is a multiple of 76,923.