12800000

Names of 12800000

• Cardinal: 12800000 can be written as Twelve million, eight hundred thousand.

Scientific notation

• Scientific notation: 1.28 × 10⁷

Factors of 12800000

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 17
• Sum of prime factors: 7

Divisors of 12800000

• Number of divisors d(n): 78
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 128 160 200 250 256 320 400 500 512 625 640 800 1000 1024 1250 1280 1600 2000 2048 2500 2560 3125 3200 4000 4096 5000 5120 6250 6400 8000 10000 10240 12500 12800 16000 20000 20480 25000 25600 32000 40000 50000 51200 64000 80000 100000 102400 128000 160000 200000 256000 320000 400000 512000 640000 800000 1280000 1600000 2560000 3200000 6400000 12800000
• Sum of all divisors σ(n): 31994046
• Sum of proper divisors (its aliquot sum) s(n): 19194046
• 12800000 is an abundant number, because the sum of its proper divisors (19194046) is greater than itself. Its abundance is 6394046

Bases of 12800000

• Binary: 110000110101000000000000₂
• Hexadecimal: 0xC35000
• Base-36: 7MCJK

Squares and roots of 12800000

• 12800000 squared (12800000²) is 163840000000000
• 12800000 cubed (12800000³) is 2097152000000000000000
• The square root of 12800000 is 3577.7087639997
• The cube root of 12800000 is 233.9214190571

Scales and comparisons

• 12,800,000 seconds is equal to 21 weeks, 1 day, 3 hours, 33 minutes, 20 seconds.
• To count from 1 to 12,800,000 would take you about thirty-one weeks!

  This is a very rough estimate, based on a speaking rate of half a second every third order of magnitude. If you speak quickly, you could probably say any randomly-chosen number between one and a thousand in around half a second. Very big numbers obviously take longer to say, so we add half a second for every extra x1000. (We do not count involuntary pauses, bathroom breaks or the necessity of sleep in our calculation!)

• A cube with a volume of 12800000 cubic inches would be around 19.5 feet tall.

Recreational maths with 12800000

• 12800000 backwards is 00000821
• The number of decimal digits it has is: 8
• The sum of 12800000's digits is 11
• More coming soon!