68728491720

Names of 68728491720

• Cardinal: 68728491720 can be written as Sixty-eight billion, seven hundred twenty-eight million, four hundred ninety-one thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 6.872849172 × 10¹⁰

Factors of 68728491720

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 125731

Divisors of 68728491720

• Number of divisors d(n): 288
• Complete list of divisors:
  1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 28 30 31 35 36 40 42 45 49 56 60 62 63 70 72 84 90 93 98 105 120 124 126 140 147 155 168 180 186 196 210 217 245 248 252 279 280 294 310 315 360 372 392 420 434 441 465 490 504 558 588 620 630 651 735 744 840 868 882 930 980 1085 1116 1176 1240 1260 1302 1395 1470 1519 1736 1764 1860 1953 1960 2170 2205 2232 2520 2604 2790 2940 3038 3255 3528 3720 3906 4340 4410 4557 5208 5580 5880 6076 6510 7595 7812 8680 8820 9114 9765 11160 12152 13020 13671 15190 15624 17640 18228 19530 22785 26040 27342 30380 36456 39060 45570 54684 60760 68355 78120 91140 109368 125683 136710 182280 251366 273420 377049 502732 546840 628415 754098 879781 1005464 1131147 1256830 1508196 1759562 1885245 2262294 2513660 2639343 3016392 3519124 3770490 3896173 4398905 4524588 5027320 5278686 5655735 6158467 7038248 7540980 7792346 7918029 8797810 9049176 10557372 11311470 11688519 12316934 13196715 15081960 15584692 15836058 17595620 18475401 19480865 21114744 22622940 23377038 24633868 26393430 27273211 30792335 31169384 31672116 35065557 35191240 36950802 38961730 39590145 45245880 46754076 49267736 52786860 54546422 55426203 58442595 61584670 63344232 70131114 73901604 77923460 79180290 81819633 92377005 93508152 105573720 109092844 110852406 116885190 123169340 136366055 140262228 147803208 155846920 158360580 163639266 175327785 184754010 190912477 218185688 221704812 233770380 245458899 246338680 272732110 277131015 280524456 316721160 327278532 350655570 369508020 381824954 409098165 443409624 467540760 490917798 545464220 554262030 572737431 654557064 701311140 739016040 763649908 818196330 954562385 981835596 1090928440 1108524060 1145474862 1227294495 1402622280 1527299816 1636392660 1718212293 1909124770 1963671192 2217048120 2290949724 2454588990 2863687155 3272785320 3436424586 3818249540 4581899448 4909177980 5727374310 6872849172 7636499080 8591061465 9818355960 11454748620 13745698344 17182122930 22909497240 34364245860 68728491720
• Sum of all divisors σ(n): 268219710720
• Sum of proper divisors (its aliquot sum) s(n): 199491219000
• 68728491720 is an abundant number, because the sum of its proper divisors (199491219000) is greater than itself. Its abundance is 130762727280

Bases of 68728491720

• Binary: 1000000000000100010011000111011001000₂
• Hexadecimal: 0x1000898EC8
• Base-36: VKN63M0

Squares and roots of 68728491720

• 68728491720 squared (68728491720²) is 4723605574106108558400
• 68728491720 cubed (68728491720³) is 324646286588497528457415536448000
• The square root of 68728491720 is 262161.1941535207
• The cube root of 68728491720 is 4096.1791038079

Scales and comparisons

• 68,728,491,720 seconds is equal to 2,185 years, 18 weeks, 2 days, 15 hours, 42 minutes.
• To count from 1 to 68,728,491,720 would take you about four thousand, three hundred seventy 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 68728491720 cubic inches would be around 341.3 feet tall.

Recreational maths with 68728491720

• 68728491720 backwards is 02719482786
• The number of decimal digits it has is: 11
• The sum of 68728491720's digits is 54
• More coming soon!