128420100390

Names of 128420100390

• Cardinal: 128420100390 can be written as One hundred twenty-eight billion, four hundred twenty million, one hundred thousand, three hundred ninety.

Scientific notation

• Scientific notation: 1.2842010039 × 10¹¹

Factors of 128420100390

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 3082

Divisors of 128420100390

• Number of divisors d(n): 48
• Complete list of divisors:
  1 2 3 5 6 10 15 30 1093 1979 2186 3279 3958 5465 5937 6558 9895 10930 11874 16395 19790 29685 32790 59370 2163047 3916441 4326094 6489141 7832882 10815235 11749323 12978282 19582205 21630470 23498646 32445705 39164410 58746615 64891410 117493230 4280670013 8561340026 12842010039 21403350065 25684020078 42806700130 64210050195 128420100390
• Sum of all divisors σ(n): 308646185328
• Sum of proper divisors (its aliquot sum) s(n): 180226084938
• 128420100390 is an abundant number, because the sum of its proper divisors (180226084938) is greater than itself. Its abundance is 51805984548

Bases of 128420100390

• Binary: 1110111100110011011110011100100100110₂
• Hexadecimal: 0x1DE66F3926
• Base-36: 1MZU0FMU

Squares and roots of 128420100390

• 128420100390 squared (128420100390²) is 16491722184177678152100
• 128420100390 cubed (128420100390³) is 2117868618496087497889791689319000
• The square root of 128420100390 is 358357.5036049895
• The cube root of 128420100390 is 5045.1916508815

Scales and comparisons

• 128,420,100,390 seconds is equal to 4,083 years, 18 weeks, 5 days, 18 hours, 6 minutes, 30 seconds.
• To count from 1 to 128,420,100,390 would take you about eight thousand, one hundred sixty-six 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 128420100390 cubic inches would be around 420.4 feet tall.

Recreational maths with 128420100390

• 128420100390 backwards is 093001024821
• 128420100390 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 128420100390's digits is 30
• More coming soon!