81423090
81,423,090 is an even composite number composed of six prime numbers multiplied together.
81423090 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred twenty-eight divisors.
Prime factorization of 81423090:
2 × 33 × 5 × 7 × 67 × 643
(2 × 3 × 3 × 3 × 5 × 7 × 67 × 643)See below for interesting mathematical facts about the number 81423090 from the Numbermatics database.
Names of 81423090
- Cardinal: 81423090 can be written as Eighty-one million, four hundred twenty-three thousand and ninety.
Scientific notation
- Scientific notation: 8.142309 × 107
Factors of 81423090
Divisors of 81423090
- Number of divisors d(n): 128
-
Complete list of divisors:
1 2 3 5 6 7 9 10 14 15 18 21 27 30 35 42 45 54 63 67 70 90 105 126 134 135 189 201 210 270 315 335 378 402 469 603 630 643 670 938 945 1005 1206 1286 1407 1809 1890 1929 2010 2345 2814 3015 3215 3618 3858 4221 4501 4690 5787 6030 6430 7035 8442 9002 9045 9645 11574 12663 13503 14070 17361 18090 19290 21105 22505 25326 27006 28935 34722 40509 42210 43081 45010 57870 63315 67515 81018 86162 86805 121527 126630 129243 135030 173610 202545 215405 243054 258486 301567 387729 405090 430810 603134 607635 646215 775458 904701 1163187 1215270 1292430 1507835 1809402 1938645 2326374 2714103 3015670 3877290 4523505 5428206 5815935 8142309 9047010 11631870 13570515 16284618 27141030 40711545 81423090
- Sum of all divisors σ(n): 252241920
- Sum of proper divisors (its aliquot sum) s(n): 170818830
- 81423090 is an abundant number, because the sum of its proper divisors (170818830) is greater than itself. Its abundance is 89395740
Bases of 81423090
- Binary: 1001101101001101010111100102
- Hexadecimal: 0x4DA6AF2
- Base-36: 1CH6GI
Squares and roots of 81423090
- 81423090 squared (814230902) is 6629719585148100
- 81423090 cubed (814230903) is 539812254456276409629000
-
The
square root of 81423090 is 9023.4743862883 -
The
cube root of 81423090 is 433.4268982705
Scales and comparisons
How big is 81423090?- 81,423,090 seconds is equal to 2 years, 30 weeks, 4 days, 9 hours, 31 minutes, 30 seconds.
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To count from 1 to 81,423,090 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 81423090 cubic inches would be around 36.1 feet tall.
Recreational maths with 81423090
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