12805398879

Names of 12805398879

• Cardinal: 12805398879 can be written as Twelve billion, eight hundred five million, three hundred ninety-eight thousand, eight hundred seventy-nine.

Scientific notation

• Scientific notation: 1.2805398879 × 10¹⁰

Factors of 12805398879

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 426

Divisors of 12805398879

• Number of divisors d(n): 144
• Complete list of divisors:
  1 3 7 13 21 23 39 49 69 73 91 147 161 169 219 273 299 307 483 507 511 637 897 921 949 1127 1183 1533 1679 1911 2093 2149 2847 3381 3549 3577 3887 3991 5037 6279 6447 6643 7061 8281 10731 11661 11753 11973 12337 14651 15043 19929 21183 21827 22411 24843 27209 27937 35259 37011 43953 45129 46501 49427 51883 65481 67233 81627 82271 83811 86359 91793 139503 148281 152789 155649 156877 190463 195559 246813 259077 275379 283751 291343 345989 363181 458367 470631 515453 571389 586677 604513 642551 851253 874029 1037967 1069523 1089543 1098139 1193309 1546359 1813539 1927653 1986257 2039401 2542267 3208569 3294417 3579927 3608171 3787459 4497857 5958771 6118203 6700889 7626801 8353163 10824513 11362377 13493571 13903799 14275807 20102667 25059489 25257197 26512213 41711397 42827421 46906223 58472141 75771591 79536639 87111557 140718669 175416423 185585491 261334671 328343561 556756473 609780899 985030683 1829342697 4268466293 12805398879
• Sum of all divisors σ(n): 22823361792
• Sum of proper divisors (its aliquot sum) s(n): 10017962913
• 12805398879 is a deficient number, because the sum of its proper divisors (10017962913) is less than itself. Its deficiency is 2787435966

Bases of 12805398879

• Binary: 1011111011010000101110000101011111₂
• Hexadecimal: 0x2FB42E15F
• Base-36: 5VS050F

Squares and roots of 12805398879

• 12805398879 squared (12805398879²) is 163978240450294456641
• 12805398879 cubed (12805398879³) is 2099806776442593090290575505439
• The square root of 12805398879 is 113160.9423741251
• The cube root of 12805398879 is 2339.5430280493

Scales and comparisons

• 12,805,398,879 seconds is equal to 407 years, 8 weeks, 6 days, 15 hours, 14 minutes, 39 seconds.
• To count from 1 to 12,805,398,879 would take you about eight hundred fourteen 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 12805398879 cubic inches would be around 195 feet tall.

Recreational maths with 12805398879

• 12805398879 backwards is 97889350821
• The number of decimal digits it has is: 11
• The sum of 12805398879's digits is 60
• More coming soon!