81027238890

Names of 81027238890

• Cardinal: 81027238890 can be written as Eighty-one billion, twenty-seven million, two hundred thirty-eight thousand, eight hundred ninety.

Scientific notation

• Scientific notation: 8.102723889 × 10¹⁰

Factors of 81027238890

• Number of distinct prime factors ω(n): 8
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 5425

Divisors of 81027238890

• Number of divisors d(n): 256
• Complete list of divisors:
  1 2 3 5 6 10 13 15 17 23 26 30 34 39 46 51 65 69 78 85 101 102 115 130 138 170 195 202 221 230 255 299 303 345 390 391 442 505 510 598 606 663 690 782 897 1010 1105 1173 1313 1326 1495 1515 1717 1794 1955 2210 2323 2346 2626 2990 3030 3315 3434 3910 3939 4485 4646 5083 5151 5261 5865 6565 6630 6969 7878 8585 8970 10166 10302 10522 11615 11730 13130 13938 15249 15783 17170 19695 22321 23230 25415 25755 26305 30199 30498 31566 34845 39390 39491 44642 50830 51510 52610 60398 66963 68393 69690 76245 78915 78982 89437 90597 111605 118473 121003 133926 136786 150995 152490 157830 178874 181194 197455 205179 223210 236946 242006 268311 301990 334815 341965 363009 394910 410358 447185 452985 513383 531361 536622 592365 605015 669630 683930 726018 894370 905970 1025895 1026766 1062722 1162681 1184730 1210030 1341555 1540149 1573039 1594083 1815045 2051790 2057051 2325362 2566915 2656805 2683110 3080298 3146078 3188166 3488043 3630090 4114102 4719117 5133830 5313610 5813405 6171153 6907693 6976086 7700745 7865195 7970415 9033137 9438234 10285255 11626810 12221303 12342306 13815386 15401490 15730390 15940830 17440215 18066274 20570510 20723079 23595585 24442606 26741663 27099411 30855765 34538465 34880430 36663909 41446158 45165685 47191170 53483326 54198822 61106515 61711530 69076930 73327818 80224989 90331370 103615395 117430781 122213030 133708315 135497055 158876939 160449978 183319545 207230790 207762151 234861562 267416630 270994110 317753878 352292343 366639090 401124945 415524302 476630817 587153905 623286453 704584686 794384695 802249890 953261634 1038810755 1174307810 1246572906 1588769390 1761461715 2077621510 2383154085 2700907963 3116432265 3522923430 4766308170 5401815926 6232864530 8102723889 13504539815 16205447778 27009079630 40513619445 81027238890
• Sum of all divisors σ(n): 233719686144
• Sum of proper divisors (its aliquot sum) s(n): 152692447254
• 81027238890 is an abundant number, because the sum of its proper divisors (152692447254) is greater than itself. Its abundance is 71665208364

Bases of 81027238890

• Binary: 1001011011101100110011000101111101010₂
• Hexadecimal: 0x12DD998BEA
• Base-36: 1181IXNU

Squares and roots of 81027238890

• 81027238890 squared (81027238890²) is 6565413442137128432100
• 81027238890 cubed (81027238890³) is 531977323387662297606377844369000
• The square root of 81027238890 is 284652.8392445787
• The cube root of 81027238890 is 4327.2336599909

Scales and comparisons

• 81,027,238,890 seconds is equal to 2,576 years, 21 weeks, 4 days, 6 hours, 21 minutes, 30 seconds.
• To count from 1 to 81,027,238,890 would take you about five thousand, one hundred fifty-two 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 81027238890 cubic inches would be around 360.6 feet tall.

Recreational maths with 81027238890

• 81027238890 backwards is 09883272018
• The number of decimal digits it has is: 11
• The sum of 81027238890's digits is 48
• More coming soon!