128720640330

Names of 128720640330

• Cardinal: 128720640330 can be written as One hundred twenty-eight billion, seven hundred twenty million, six hundred forty thousand, three hundred thirty.

Scientific notation

• Scientific notation: 1.2872064033 × 10¹¹

Factors of 128720640330

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 314325

Divisors of 128720640330

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 5 6 9 10 15 18 29 30 45 58 87 90 145 157 174 261 290 314 435 471 522 785 870 942 1305 1413 1570 2355 2610 2826 4553 4710 7065 9106 13659 14130 22765 27318 40977 45530 68295 81954 136590 204885 314129 409770 628258 942387 1570645 1884774 2827161 3141290 4711935 5654322 9109741 9423870 14135805 18219482 27329223 28271610 45548705 49318253 54658446 81987669 91097410 98636506 136646115 147954759 163975338 246591265 273292230 295909518 409938345 443864277 493182530 739773795 819876690 887728554 1430229337 1479547590 2219321385 2860458674 4290688011 4438642770 7151146685 8581376022 12872064033 14302293370 21453440055 25744128066 42906880110 64360320165 128720640330
• Sum of all divisors σ(n): 348420430800
• Sum of proper divisors (its aliquot sum) s(n): 219699790470
• 128720640330 is an abundant number, because the sum of its proper divisors (219699790470) is greater than itself. Its abundance is 90979150140

Bases of 128720640330

• Binary: 1110111111000010110010001100101001010₂
• Hexadecimal: 0x1DF859194A
• Base-36: 1N4SY1QI

Squares and roots of 128720640330

• 128720640330 squared (128720640330²) is 16569003246965222508900
• 128720640330 cubed (128720640330³) is 2132772707579212570586537123937000
• The square root of 128720640330 is 358776.5883248237
• The cube root of 128720640330 is 5049.1243173981

Scales and comparisons

• 128,720,640,330 seconds is equal to 4,092 years, 47 weeks, 5 days, 5 hours, 25 minutes, 30 seconds.
• To count from 1 to 128,720,640,330 would take you about eight thousand, one hundred eighty-five 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 128720640330 cubic inches would be around 420.8 feet tall.

Recreational maths with 128720640330

• 128720640330 backwards is 033046027821
• The number of decimal digits it has is: 12
• The sum of 128720640330's digits is 36
• More coming soon!