991143972
991,143,972 is an even composite number composed of five prime numbers multiplied together.
991143972 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.
Prime factorization of 991143972:
22 × 33 × 72 × 13 × 14407
(2 × 2 × 3 × 3 × 3 × 7 × 7 × 13 × 14407)See below for interesting mathematical facts about the number 991143972 from the Numbermatics database.
Names of 991143972
- Cardinal: 991143972 can be written as Nine hundred ninety-one million, one hundred forty-three thousand, nine hundred seventy-two.
Scientific notation
- Scientific notation: 9.91143972 × 108
Factors of 991143972
Divisors of 991143972
- Number of divisors d(n): 144
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Complete list of divisors:
1 2 3 4 6 7 9 12 13 14 18 21 26 27 28 36 39 42 49 52 54 63 78 84 91 98 108 117 126 147 156 182 189 196 234 252 273 294 351 364 378 441 468 546 588 637 702 756 819 882 1092 1274 1323 1404 1638 1764 1911 2457 2548 2646 3276 3822 4914 5292 5733 7644 9828 11466 14407 17199 22932 28814 34398 43221 57628 68796 86442 100849 129663 172884 187291 201698 259326 302547 374582 388989 403396 518652 561873 605094 705943 749164 777978 907641 1123746 1210188 1311037 1411886 1555956 1685619 1815282 2117829 2247492 2622074 2722923 2823772 3371238 3630564 3933111 4235658 5056857 5244148 5445846 6353487 6742476 7866222 8471316 9177259 10113714 10891692 11799333 12706974 15732444 18354518 19060461 20227428 23598666 25413948 27531777 35397999 36709036 38120922 47197332 55063554 70795998 76241844 82595331 110127108 141591996 165190662 247785993 330381324 495571986 991143972
- Sum of all divisors σ(n): 3219323520
- Sum of proper divisors (its aliquot sum) s(n): 2228179548
- 991143972 is an abundant number, because the sum of its proper divisors (2228179548) is greater than itself. Its abundance is 1237035576
Bases of 991143972
- Binary: 1110110001001110101000001001002
- Hexadecimal: 0x3B13A824
- Base-36: GE3NL0
Squares and roots of 991143972
- 991143972 squared (9911439722) is 982366373231936784
- 991143972 cubed (9911439723) is 973666509124336301346666048
-
The
square root of 991143972 is 31482.4391049995 -
The
cube root of 991143972 is 997.0392331783
Scales and comparisons
How big is 991143972?- 991,143,972 seconds is equal to 31 years, 26 weeks, 5 days, 13 hours, 46 minutes, 12 seconds.
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To count from 1 to 991,143,972 would take you about forty-seven 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 991143972 cubic inches would be around 83.1 feet tall.
Recreational maths with 991143972
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