128638914120

Names of 128638914120

• Cardinal: 128638914120 can be written as One hundred twenty-eight billion, six hundred thirty-eight million, nine hundred fourteen thousand, one hundred twenty.

Scientific notation

• Scientific notation: 1.2863891412 × 10¹¹

Factors of 128638914120

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 127768

Divisors of 128638914120

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 18 20 24 30 36 40 45 60 72 90 120 180 360 2861 5722 8583 11444 14305 17166 22888 25749 28610 34332 42915 51498 57220 68664 85830 102996 114440 124897 128745 171660 205992 249794 257490 343320 374691 499588 514980 624485 749382 999176 1029960 1124073 1248970 1498764 1873455 2248146 2497940 2997528 3746910 4496292 4995880 5620365 7493820 8992584 11240730 14987640 22481460 44962920 357330317 714660634 1071990951 1429321268 1786651585 2143981902 2858642536 3215972853 3573303170 4287963804 5359954755 6431945706 7146606340 8575927608 10719909510 12863891412 14293212680 16079864265 21439819020 25727782824 32159728530 42879638040 64319457060 128638914120
• Sum of all divisors σ(n): 418225948920
• Sum of proper divisors (its aliquot sum) s(n): 289587034800
• 128638914120 is an abundant number, because the sum of its proper divisors (289587034800) is greater than itself. Its abundance is 160948120680

Bases of 128638914120

• Binary: 1110111110011011110100000111001001000₂
• Hexadecimal: 0x1DF37A0E48
• Base-36: 1N3GADE0

Squares and roots of 128638914120

• 128638914120 squared (128638914120²) is 16547970225972735374400
• 128638914120 cubed (128638914120³) is 2128712920759223699288927646528000
• The square root of 128638914120 is 358662.6745564695
• The cube root of 128638914120 is 5048.0555088653

Scales and comparisons

• 128,638,914,120 seconds is equal to 4,090 years, 16 weeks, 4 days, 7 hours, 42 minutes.
• To count from 1 to 128,638,914,120 would take you about eight thousand, one hundred eighty 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 128638914120 cubic inches would be around 420.7 feet tall.

Recreational maths with 128638914120

• 128638914120 backwards is 021419836821
• 128638914120 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 128638914120's digits is 45
• More coming soon!