8138217780

Names of 8138217780

• Cardinal: 8138217780 can be written as Eight billion, one hundred thirty-eight million, two hundred seventeen thousand, seven hundred eighty.

Scientific notation

• Scientific notation: 8.13821778 × 10⁹

Factors of 8138217780

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 587201

Divisors of 8138217780

• Number of divisors d(n): 144
• Complete list of divisors:
  1 2 3 4 5 6 7 9 10 11 12 14 15 18 20 21 22 28 30 33 35 36 42 44 45 55 60 63 66 70 77 84 90 99 105 110 126 132 140 154 165 180 198 210 220 231 252 308 315 330 385 396 420 462 495 630 660 693 770 924 990 1155 1260 1386 1540 1980 2310 2772 3465 4620 6930 13860 587173 1174346 1761519 2348692 2935865 3523038 4110211 5284557 5871730 6458903 7046076 8220422 8807595 10569114 11743460 12330633 12917806 16440844 17615190 19376709 20551055 21138228 24661266 25835612 26422785 32294515 35230380 36991899 38753418 41102110 45212321 49322532 52845570 58130127 61653165 64589030 73983798 77506836 82204220 90424642 96883545 105691140 116260254 123306330 129178060 135636963 147967596 180849284 184959495 193767090 226061605 232520508 246612660 271273926 290650635 369918990 387534180 406910889 452123210 542547852 581301270 678184815 739837980 813821778 904246420 1162602540 1356369630 1627643556 2034554445 2712739260 4069108890 8138217780
• Sum of all divisors σ(n): 30777312384
• Sum of proper divisors (its aliquot sum) s(n): 22639094604
• 8138217780 is an abundant number, because the sum of its proper divisors (22639094604) is greater than itself. Its abundance is 14500876824

Bases of 8138217780

• Binary: 111100101000100110101100100110100₂
• Hexadecimal: 0x1E5135934
• Base-36: 3QLA910

Squares and roots of 8138217780

• 8138217780 squared (8138217780²) is 66230588634708128400
• 8138217780 cubed (8138217780³) is 538998954006847615655402952000
• The square root of 8138217780 is 90212.0711435007
• The cube root of 8138217780 is 2011.4524439235

Scales and comparisons

• 8,138,217,780 seconds is equal to 258 years, 40 weeks, 8 hours, 3 minutes.
• To count from 1 to 8,138,217,780 would take you about five hundred seventeen 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 8138217780 cubic inches would be around 167.6 feet tall.

Recreational maths with 8138217780

• 8138217780 backwards is 0877128318
• 8138217780 is a Harshad number.
• The number of decimal digits it has is: 10
• The sum of 8138217780's digits is 45
• More coming soon!