8105138640

Names of 8105138640

• Cardinal: 8105138640 can be written as Eight billion, one hundred five million, one hundred thirty-eight thousand, six hundred forty.

Scientific notation

• Scientific notation: 8.10513864 × 10⁹

Factors of 8105138640

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 12
• Sum of prime factors: 138987

Divisors of 8105138640

• Number of divisors d(n): 140
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 27 30 36 40 45 48 54 60 72 80 81 90 108 120 135 144 162 180 216 240 243 270 324 360 405 432 486 540 648 720 729 810 972 1080 1215 1296 1458 1620 1944 2160 2430 2916 3240 3645 3888 4860 5832 6480 7290 9720 11664 14580 19440 29160 58320 138977 277954 416931 555908 694885 833862 1111816 1250793 1389770 1667724 2084655 2223632 2501586 2779540 3335448 3752379 4169310 5003172 5559080 6253965 6670896 7504758 8338620 10006344 11118160 11257137 12507930 15009516 16677240 18761895 20012688 22514274 25015860 30019032 33354480 33771411 37523790 45028548 50031720 56285685 60038064 67542822 75047580 90057096 100063440 101314233 112571370 135085644 150095160 168857055 180114192 202628466 225142740 270171288 300190320 337714110 405256932 450285480 506571165 540342576 675428220 810513864 900570960 1013142330 1350856440 1621027728 2026284660 2701712880 4052569320 8105138640
• Sum of all divisors σ(n): 28253949444
• Sum of proper divisors (its aliquot sum) s(n): 20148810804
• 8105138640 is an abundant number, because the sum of its proper divisors (20148810804) is greater than itself. Its abundance is 12043672164

Bases of 8105138640

• Binary: 111100011000110101001100111010000₂
• Hexadecimal: 0x1E31A99D0
• Base-36: 3Q1L900

Squares and roots of 8105138640

• 8105138640 squared (8105138640²) is 65693272373621049600
• 8105138640 cubed (8105138640³) is 532453080303480485830316544000
• The square root of 8105138640 is 90028.5434737227
• The cube root of 8105138640 is 2008.7234487343

Scales and comparisons

• 8,105,138,640 seconds is equal to 257 years, 37 weeks, 2 days, 11 hours, 24 minutes.
• To count from 1 to 8,105,138,640 would take you about five hundred fifteen 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 8105138640 cubic inches would be around 167.4 feet tall.

Recreational maths with 8105138640

• 8105138640 backwards is 0468315018
• 8105138640 is a Harshad number.
• The number of decimal digits it has is: 10
• The sum of 8105138640's digits is 36
• More coming soon!