31989689721
31,989,689,721 is an odd composite number composed of four prime numbers multiplied together.
31989689721 is an odd composite number. It is composed of four distinct prime numbers multiplied together. It has a total of ninety divisors.
Prime factorization of 31989689721:
34 × 112 × 292 × 3881
(3 × 3 × 3 × 3 × 11 × 11 × 29 × 29 × 3881)See below for interesting mathematical facts about the number 31989689721 from the Numbermatics database.
Names of 31989689721
- Cardinal: 31989689721 can be written as Thirty-one billion, nine hundred eighty-nine million, six hundred eighty-nine thousand, seven hundred twenty-one.
Scientific notation
- Scientific notation: 3.1989689721 × 1010
Factors of 31989689721
Divisors of 31989689721
- Number of divisors d(n): 90
-
Complete list of divisors:
1 3 9 11 27 29 33 81 87 99 121 261 297 319 363 783 841 891 957 1089 2349 2523 2871 3267 3509 3881 7569 8613 9251 9801 10527 11643 22707 25839 27753 31581 34929 42691 68121 83259 94743 101761 104787 112549 128073 249777 284229 305283 314361 337647 384219 469601 749331 915849 1012941 1152657 1238039 1408803 2747547 3038823 3263921 3457971 3714117 4226409 8242641 9116469 9791763 11142351 12679227 13618429 29375289 33427053 35903131 38037681 40855287 88125867 100281159 107709393 122565861 264377601 323128179 367697583 394934441 969384537 1103092749 1184803323 2908153611 3554409969 10663229907 31989689721
- Sum of all divisors σ(n): 54414005646
- Sum of proper divisors (its aliquot sum) s(n): 22424315925
- 31989689721 is a deficient number, because the sum of its proper divisors (22424315925) is less than itself. Its deficiency is 9565373796
Bases of 31989689721
- Binary: 111011100101011101111101101011110012
- Hexadecimal: 0x772BBED79
- Base-36: EP1U2K9
Squares and roots of 31989689721
- 31989689721 squared (319896897212) is 1023340248445853057841
- 31989689721 cubed (319896897213) is 32736337026793891789492656152361
-
The
square root of 31989689721 is 178856.6177724493 -
The
cube root of 31989689721 is 3174.4610975657
Scales and comparisons
How big is 31989689721?- 31,989,689,721 seconds is equal to 1,017 years, 9 weeks, 55 minutes, 21 seconds.
-
To count from 1 to 31,989,689,721 would take you about two thousand and thirty-four 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 31989689721 cubic inches would be around 264.5 feet tall.
Recreational maths with 31989689721
- 31989689721 backwards is 12798698913
- The number of decimal digits it has is: 11
- The sum of 31989689721's digits is 63
- More coming soon!
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