8121812800

Names of 8121812800

• Cardinal: 8121812800 can be written as Eight billion, one hundred twenty-one million, eight hundred twelve thousand, eight hundred.

Scientific notation

• Scientific notation: 8.1218128 × 10⁹

Factors of 8121812800

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 5076140

Divisors of 8121812800

• Number of divisors d(n): 42
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 160 200 320 400 800 1600 5076133 10152266 20304532 25380665 40609064 50761330 81218128 101522660 126903325 162436256 203045320 253806650 324872512 406090640 507613300 812181280 1015226600 1624362560 2030453200 4060906400 8121812800
• Sum of all divisors σ(n): 19984739558
• Sum of proper divisors (its aliquot sum) s(n): 11862926758
• 8121812800 is an abundant number, because the sum of its proper divisors (11862926758) is greater than itself. Its abundance is 3741113958

Bases of 8121812800

• Binary: 111100100000110010000011101000000₂
• Hexadecimal: 0x1E4190740
• Base-36: 3QBIMV4

Squares and roots of 8121812800

• 8121812800 squared (8121812800²) is 65963843158243840000
• 8121812800 cubed (8121812800³) is 535745985699817245233152000000
• The square root of 8121812800 is 90121.1007478271
• The cube root of 8121812800 is 2010.0999760507

Scales and comparisons

• 8,121,812,800 seconds is equal to 258 years, 12 weeks, 6 days, 11 hours, 6 minutes, 40 seconds.
• To count from 1 to 8,121,812,800 would take you about five hundred sixteen years!

  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 8121812800 cubic inches would be around 167.5 feet tall.

Recreational maths with 8121812800

• 8121812800 backwards is 0082181218
• The number of decimal digits it has is: 10
• The sum of 8121812800's digits is 31
• More coming soon!