138243105

Names of 138243105

• Cardinal: 138243105 can be written as One hundred thirty-eight million, two hundred forty-three thousand, one hundred five.

Scientific notation

• Scientific notation: 1.38243105 × 10⁸

Factors of 138243105

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 70

Divisors of 138243105

• Number of divisors d(n): 240
• Complete list of divisors:
  1 3 5 7 9 11 13 15 21 27 31 33 35 39 45 55 63 65 77 81 91 93 99 105 117 121 135 143 155 165 189 195 217 231 273 279 297 315 341 351 363 385 403 405 429 455 465 495 567 585 605 651 693 715 819 837 847 891 945 1001 1023 1053 1085 1089 1155 1209 1287 1365 1395 1485 1573 1705 1755 1815 1953 2015 2079 2145 2387 2457 2511 2541 2821 2835 3003 3069 3255 3267 3465 3627 3751 3861 4095 4185 4235 4433 4455 4719 5005 5115 5265 5445 5859 6045 6237 6435 7161 7371 7623 7865 8463 9009 9207 9765 9801 10395 10881 11011 11253 11583 11935 12285 12555 12705 13299 14105 14157 15015 15345 16335 17577 18135 18755 19305 21483 22165 22869 23595 25389 26257 27027 27621 29295 31031 31185 32643 33033 33759 35805 36855 38115 39897 42315 42471 45045 46035 48763 49005 54405 55055 56265 57915 64449 66495 68607 70785 76167 78771 81081 87885 93093 99099 101277 107415 114345 119691 126945 127413 131285 135135 138105 146289 155155 163215 165165 168795 193347 199485 212355 228501 236313 243815 279279 297297 303831 322245 341341 343035 359073 380835 393855 405405 438867 465465 495495 506385 598455 637065 708939 731445 837837 891891 966735 1024023 1142505 1181565 1316601 1396395 1486485 1519155 1706705 1795365 2126817 2194335 2513511 3072069 3544695 3949803 4189185 4459455 5120115 6583005 9216207 10634085 12567555 15360345 19749015 27648621 46081035 138243105
• Sum of all divisors σ(n): 346063872
• Sum of proper divisors (its aliquot sum) s(n): 207820767
• 138243105 is an abundant number, because the sum of its proper divisors (207820767) is greater than itself. Its abundance is 69577662

Bases of 138243105

• Binary: 1000001111010110110000100001₂
• Hexadecimal: 0x83D6C21
• Base-36: 2AB129

Squares and roots of 138243105

• 138243105 squared (138243105²) is 19111156080041025
• 138243105 cubed (138243105³) is 2641985556644499823382625
• The square root of 138243105 is 11757.6828074243
• The cube root of 138243105 is 517.0681968285

Scales and comparisons

• 138,243,105 seconds is equal to 4 years, 20 weeks, 4 days, 51 minutes, 45 seconds.
• To count from 1 to 138,243,105 would take you about six 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 138243105 cubic inches would be around 43.1 feet tall.

Recreational maths with 138243105

• 138243105 backwards is 501342831
• 138243105 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 138243105's digits is 27
• More coming soon!