Numbers 2,300,000s

A page of the Numeropedia - the Special Encyclopedia of Numbers

2,000,000 2,100,0002,200,0002,300,0002,400,000

2,500,0002,600,0002,700,0002,800,0002,900,000

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 2,307,690

[Math.]  076,923×30 = 2,307,690 and 2+307,690 = 307,692, a digit-rotation of 076,923.

 

2,339,933

[Math.]  A right-truncatable prime number: self, 233993, 23399, 2339, 233, 23 and 2 are prime numbers.

 

2,345,679

[Math.]  Number 02,346,679 misses 2 digits 1 and 8 in 10 digits 0-9:

02,345,679×2 = 04,691,358 misses 2 digits 2 and 7 (modulo 9)

02,345,679×4 = 09,382,716 misses 2 digits 4 and 5 (modulo 9)

 

2,345,689

[Math.]  Number 02,346,689 misses 2 digits 1 and 7 in 10 digits 0-9:

02,345,689×2 = 04,691,378 misses 2 digits 2 and 5 (modulo 9)

02,345,689×4 = 09,382,756 misses 2 digits 4 and 1 (modulo 9).

 

2,345,789

[Math.]  Number 02,346,789 misses 2 digits 1 and 6 in 10 digits 0-9:

02,345,789×2 = 04,691,578 misses 2 digits 2 and 3 (modulo 9).

 

2,346,789

[Math.]  Number 02,346,789 misses 2 digits 1 and 5 in 10 digits 0-9:

02,346,789×2 = 04,693,578 misses 2 digits 2 and 1 (modulo 9)

02,346,789×4 = 09,387,156 misses 2 digits 4 and 2 (modulo 9).

 

2,358,900

[Math.]  Sum (in degrees) of all internal angles of a 13,107-side polygon.

A regular 13,107-side polygon is constructible by using only straightedge and compass.

 

2,360,591

[Calendar]  A sidereal month is the time interval for the Moon to complete one orbit around the Earth, relative a fixed star, 2,360,591.5104 seconds = 27 days 7 h 43 m 11.51 s. A synodic month is the interval between full moons, 2,551,466.2176 seconds = 29 days 12 h 4 m 26.22 s.

 

2,371,600

[Math.]  Sum of the first 55 cube numbers: 13+23+…+543+553 = 2,371,600 = (1+2+…+54+55)2 = 15402.

 

2,384,613

[Math.]  076,923×31 = 2,384,613 and 2+384,613 = 384,615, a digit-rotation of 153,846 = 076,923×2.

 

2,399,333

[Math.]  A right-truncatable prime number: self, 239933, 23993, 2399, 239, 23 and 2 are prime numbers.