1991729789440

Names of 1991729789440

• Cardinal: 1991729789440 can be written as One trillion, nine hundred ninety-one billion, seven hundred twenty-nine million, seven hundred eighty-nine thousand, four hundred forty.

Scientific notation

• Scientific notation: 1.99172978944 × 10¹²

Factors of 1991729789440

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 27900

Divisors of 1991729789440

• Number of divisors d(n): 60
• Complete list of divisors:
  1 2 4 5 8 10 16 20 32 40 64 80 128 160 256 320 512 640 1280 2560 27893 55786 111572 139465 223144 278930 446288 557860 892576 1115720 1785152 2231440 3570304 4462880 7140608 8925760 14281216 17851520 35703040 71406080 778019449 1556038898 3112077796 3890097245 6224155592 7780194490 12448311184 15560388980 24896622368 31120777960 49793244736 62241555920 99586489472 124483111840 199172978944 248966223680 398345957888 497932447360 995864894720 1991729789440
• Sum of all divisors σ(n): 4775654591334
• Sum of proper divisors (its aliquot sum) s(n): 2783924801894
• 1991729789440 is an abundant number, because the sum of its proper divisors (2783924801894) is greater than itself. Its abundance is 792195012454

Bases of 1991729789440

• Binary: 11100111110111100010110001011101000000000₂
• Hexadecimal: 0x1CFBC58BA00
• Base-36: PEZKHP8G

Squares and roots of 1991729789440

• 1991729789440 squared (1991729789440²) is 3966987554142706735513600
• 1991729789440 cubed (1991729789440³) is 7901167285923753886036172298256384000
• The square root of 1991729789440 is 1411286.5724012253
• The cube root of 1991729789440 is 12581.8201526195

Scales and comparisons

• 1,991,729,789,440 seconds is equal to 63,330 years, 44 weeks, 2 hours, 50 minutes, 40 seconds.
• To count from 1 to 1,991,729,789,440 would take you about one hundred fifty-eight thousand, three hundred twenty-seven 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 1991729789440 cubic inches would be around 1048.5 feet tall.

Recreational maths with 1991729789440

• 1991729789440 backwards is 0449879271991
• The number of decimal digits it has is: 13
• The sum of 1991729789440's digits is 70
• More coming soon!