81428490
81,428,490 is an even composite number composed of seven prime numbers multiplied together.
81428490 is an even composite number. It is composed of seven distinct prime numbers multiplied together. It has a total of three hundred twenty divisors.
Prime factorization of 81428490:
2 × 34 × 5 × 11 × 13 × 19 × 37
(2 × 3 × 3 × 3 × 3 × 5 × 11 × 13 × 19 × 37)See below for interesting mathematical facts about the number 81428490 from the Numbermatics database.
Names of 81428490
- Cardinal: 81428490 can be written as Eighty-one million, four hundred twenty-eight thousand, four hundred ninety.
Scientific notation
- Scientific notation: 8.142849 × 107
Factors of 81428490
Divisors of 81428490
- Number of divisors d(n): 320
-
Complete list of divisors:
1 2 3 5 6 9 10 11 13 15 18 19 22 26 27 30 33 37 38 39 45 54 55 57 65 66 74 78 81 90 95 99 110 111 114 117 130 135 143 162 165 171 185 190 195 198 209 222 234 247 270 285 286 297 330 333 342 351 370 390 405 407 418 429 481 494 495 513 555 570 585 594 627 666 702 703 715 741 810 814 855 858 891 962 990 999 1026 1045 1053 1110 1170 1221 1235 1254 1287 1406 1430 1443 1482 1485 1539 1665 1710 1755 1782 1881 1998 2035 2090 2106 2109 2145 2223 2405 2442 2470 2565 2574 2717 2886 2970 2997 3078 3135 3330 3510 3515 3663 3705 3762 3861 4070 4218 4290 4329 4446 4455 4810 4995 5130 5265 5291 5434 5643 5994 6105 6270 6327 6435 6669 7030 7215 7326 7410 7695 7722 7733 8151 8658 8910 9139 9405 9990 10530 10545 10582 10989 11115 11286 11583 12210 12654 12870 12987 13338 13585 14430 14985 15390 15466 15873 16302 16929 18278 18315 18810 18981 19305 20007 21090 21645 21978 22230 23166 23199 24453 25974 26455 27170 27417 28215 29970 31635 31746 32967 33345 33858 36630 37962 38610 38665 38961 40014 40755 43290 45695 46398 47619 48906 52910 54834 54945 56430 56943 57915 63270 64935 65934 66690 69597 73359 77330 77922 79365 81510 82251 84645 91390 94905 95238 100035 100529 109890 113886 115830 115995 122265 129870 137085 139194 142857 146718 158730 164502 164835 169290 189810 194805 200070 201058 208791 220077 231990 238095 244530 246753 274170 284715 285714 301587 329670 347985 366795 389610 411255 417582 428571 440154 476190 493506 502645 569430 603174 626373 695970 714285 733590 740259 822510 857142 904761 1005290 1043955 1100385 1233765 1252746 1428570 1480518 1507935 1809522 2087910 2142855 2200770 2467530 2714283 3015870 3131865 3701295 4285710 4523805 5428566 6263730 7402590 8142849 9047610 13571415 16285698 27142830 40714245 81428490
- Sum of all divisors σ(n): 278087040
- Sum of proper divisors (its aliquot sum) s(n): 196658550
- 81428490 is an abundant number, because the sum of its proper divisors (196658550) is greater than itself. Its abundance is 115230060
Bases of 81428490
- Binary: 1001101101010000000000010102
- Hexadecimal: 0x4DA800A
- Base-36: 1CHAMI
Squares and roots of 81428490
- 81428490 squared (814284902) is 6630598983680100
- 81428490 cubed (814284903) is 539919663036605186049000
-
The
square root of 81428490 is 9023.7736008833 -
The
cube root of 81428490 is 433.4364797197
Scales and comparisons
How big is 81428490?- 81,428,490 seconds is equal to 2 years, 30 weeks, 4 days, 11 hours, 1 minute, 30 seconds.
-
To count from 1 to 81,428,490 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 81428490 cubic inches would be around 36.1 feet tall.
Recreational maths with 81428490
Link to this page
HTML: To link to this page, just copy and paste the link below into your blog, web page or email.
BBCODE: To link to this page in a forum post or comment box, just copy and paste the link code below:
Cite this page
MLA style:
"Number 81428490 - Facts about the integer". Numbermatics.com. 2024. Web. 3 May 2024.
APA style:
Numbermatics. (2024). Number 81428490 - Facts about the integer. Retrieved 3 May 2024, from https://numbermatics.com/n/81428490/
Chicago style:
Numbermatics. 2024. "Number 81428490 - Facts about the integer". https://numbermatics.com/n/81428490/
The information we have on file for 81428490 includes mathematical data and numerical statistics calculated using standard algorithms and methods. We are adding more all the time. If there are any features you would like to see, please contact us. Information provided for educational use, intellectual curiosity and fun!
Keywords: Divisors of 81428490, math, Factors of 81428490, curriculum, school, college, exams, university, Prime factorization of 81428490, STEM, science, technology, engineering, physics, economics, calculator, eighty-one million, four hundred twenty-eight thousand, four hundred ninety.