81764340
81,764,340 is an even composite number composed of six prime numbers multiplied together.
81764340 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred ninety-two divisors.
Prime factorization of 81764340:
22 × 3 × 5 × 73 × 29 × 137
(2 × 2 × 3 × 5 × 7 × 7 × 7 × 29 × 137)See below for interesting mathematical facts about the number 81764340 from the Numbermatics database.
Names of 81764340
- Cardinal: 81764340 can be written as Eighty-one million, seven hundred sixty-four thousand, three hundred forty.
Scientific notation
- Scientific notation: 8.176434 × 107
Factors of 81764340
Divisors of 81764340
- Number of divisors d(n): 192
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Complete list of divisors:
1 2 3 4 5 6 7 10 12 14 15 20 21 28 29 30 35 42 49 58 60 70 84 87 98 105 116 137 140 145 147 174 196 203 210 245 274 290 294 343 348 406 411 420 435 490 548 580 588 609 685 686 735 812 822 870 959 980 1015 1029 1218 1370 1372 1421 1470 1644 1715 1740 1918 2030 2055 2058 2436 2740 2842 2877 2940 3045 3430 3836 3973 4060 4110 4116 4263 4795 5145 5684 5754 6090 6713 6860 7105 7946 8220 8526 9590 9947 10290 11508 11919 12180 13426 14210 14385 15892 17052 19180 19865 19894 20139 20580 21315 23838 26852 27811 28420 28770 29841 33565 39730 39788 40278 42630 46991 47676 49735 55622 57540 59595 59682 67130 79460 80556 83433 85260 93982 99470 100695 111244 119190 119364 134260 139055 140973 149205 166866 187964 194677 198940 201390 234955 238380 278110 281946 298410 333732 389354 402780 417165 469910 556220 563892 584031 596820 704865 778708 834330 939820 973385 1168062 1362739 1409730 1668660 1946770 2336124 2725478 2819460 2920155 3893540 4088217 5450956 5840310 6813695 8176434 11680620 13627390 16352868 20441085 27254780 40882170 81764340
- Sum of all divisors σ(n): 278208000
- Sum of proper divisors (its aliquot sum) s(n): 196443660
- 81764340 is an abundant number, because the sum of its proper divisors (196443660) is greater than itself. Its abundance is 114679320
Bases of 81764340
- Binary: 1001101111110011111111101002
- Hexadecimal: 0x4DF9FF4
- Base-36: 1COHRO
Squares and roots of 81764340
- 81764340 squared (817643402) is 6685407295635600
- 81764340 cubed (817643403) is 546627915158829714504000
-
The
square root of 81764340 is 9042.3636290519 -
The
cube root of 81764340 is 434.0315620475
Scales and comparisons
How big is 81764340?- 81,764,340 seconds is equal to 2 years, 31 weeks, 1 day, 8 hours, 19 minutes.
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To count from 1 to 81,764,340 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 81764340 cubic inches would be around 36.2 feet tall.
Recreational maths with 81764340
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