68321640

Names of 68321640

• Cardinal: 68321640 can be written as Sixty-eight million, three hundred twenty-one thousand, six hundred forty.

Scientific notation

• Scientific notation: 6.832164 × 10⁷

Factors of 68321640

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 447

Divisors of 68321640

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 15 17 20 24 30 34 40 51 60 68 85 102 107 120 136 170 204 214 255 313 321 340 408 428 510 535 626 642 680 856 939 1020 1070 1252 1284 1565 1605 1819 1878 2040 2140 2504 2568 3130 3210 3638 3756 4280 4695 5321 5457 6260 6420 7276 7512 9095 9390 10642 10914 12520 12840 14552 15963 18190 18780 21284 21828 26605 27285 31926 33491 36380 37560 42568 43656 53210 54570 63852 66982 72760 79815 100473 106420 109140 127704 133964 159630 167455 200946 212840 218280 267928 319260 334910 401892 502365 569347 638520 669820 803784 1004730 1138694 1339640 1708041 2009460 2277388 2846735 3416082 4018920 4554776 5693470 6832164 8540205 11386940 13664328 17080410 22773880 34160820 68321640
• Sum of all divisors σ(n): 219749760
• Sum of proper divisors (its aliquot sum) s(n): 151428120
• 68321640 is an abundant number, because the sum of its proper divisors (151428120) is greater than itself. Its abundance is 83106480

Bases of 68321640

• Binary: 100000100101000000101101000₂
• Hexadecimal: 0x4128168
• Base-36: 14ODBC

Squares and roots of 68321640

• 68321640 squared (68321640²) is 4667846492289600
• 68321640 cubed (68321640³) is 318914927621472826944000
• The square root of 68321640 is 8265.6905337667
• The cube root of 68321640 is 408.8080391543

Scales and comparisons

• 68,321,640 seconds is equal to 2 years, 8 weeks, 6 days, 18 hours, 14 minutes.
• To count from 1 to 68,321,640 would take you about three 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 68321640 cubic inches would be around 34.1 feet tall.

Recreational maths with 68321640

• 68321640 backwards is 04612386
• 68321640 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 68321640's digits is 30
• More coming soon!