81041730

Names of 81041730

• Cardinal: 81041730 can be written as Eighty-one million, forty-one thousand, seven hundred thirty.

Scientific notation

• Scientific notation: 8.104173 × 10⁷

Factors of 81041730

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 35111

Divisors of 81041730

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 7 10 11 14 15 21 22 30 33 35 42 55 66 70 77 105 110 154 165 210 231 330 385 462 770 1155 2310 35083 70166 105249 175415 210498 245581 350830 385913 491162 526245 736743 771826 1052490 1157739 1227905 1473486 1929565 2315478 2455810 2701391 3683715 3859130 5402782 5788695 7367430 8104173 11577390 13506955 16208346 27013910 40520865 81041730
• Sum of all divisors σ(n): 242500608
• Sum of proper divisors (its aliquot sum) s(n): 161458878
• 81041730 is an abundant number, because the sum of its proper divisors (161458878) is greater than itself. Its abundance is 80417148

Bases of 81041730

• Binary: 100110101001001100101000010₂
• Hexadecimal: 0x4D49942
• Base-36: 1C9076

Squares and roots of 81041730

• 81041730 squared (81041730²) is 6567762001392900
• 81041730 cubed (81041730³) is 532262794821143025717000
• The square root of 81041730 is 9002.3180348175
• The cube root of 81041730 is 432.7491608971

Scales and comparisons

• 81,041,730 seconds is equal to 2 years, 29 weeks, 6 days, 23 hours, 35 minutes, 30 seconds.
• To count from 1 to 81,041,730 would take you about three 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 81041730 cubic inches would be around 36.1 feet tall.

Recreational maths with 81041730

• 81041730 backwards is 03714018
• The number of decimal digits it has is: 8
• The sum of 81041730's digits is 24
• More coming soon!