81438210
81,438,210 is an even composite number composed of six prime numbers multiplied together.
81438210 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred sixty divisors.
Prime factorization of 81438210:
2 × 34 × 5 × 7 × 53 × 271
(2 × 3 × 3 × 3 × 3 × 5 × 7 × 53 × 271)See below for interesting mathematical facts about the number 81438210 from the Numbermatics database.
Names of 81438210
- Cardinal: 81438210 can be written as Eighty-one million, four hundred thirty-eight thousand, two hundred ten.
Scientific notation
- Scientific notation: 8.143821 × 107
Factors of 81438210
Divisors of 81438210
- Number of divisors d(n): 160
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Complete list of divisors:
1 2 3 5 6 7 9 10 14 15 18 21 27 30 35 42 45 53 54 63 70 81 90 105 106 126 135 159 162 189 210 265 270 271 315 318 371 378 405 477 530 542 567 630 742 795 810 813 945 954 1113 1134 1355 1431 1590 1626 1855 1890 1897 2226 2385 2439 2710 2835 2862 3339 3710 3794 4065 4293 4770 4878 5565 5670 5691 6678 7155 7317 8130 8586 9485 10017 11130 11382 12195 14310 14363 14634 16695 17073 18970 20034 21465 21951 24390 28455 28726 30051 33390 34146 36585 42930 43089 43902 50085 51219 56910 60102 71815 73170 85365 86178 100170 100541 102438 109755 129267 143630 150255 153657 170730 201082 215445 219510 256095 258534 300510 301623 307314 387801 430890 502705 512190 603246 646335 768285 775602 904869 1005410 1163403 1292670 1508115 1536570 1809738 1939005 2326806 2714607 3016230 3878010 4524345 5429214 5817015 8143821 9048690 11634030 13573035 16287642 27146070 40719105 81438210
- Sum of all divisors σ(n): 255923712
- Sum of proper divisors (its aliquot sum) s(n): 174485502
- 81438210 is an abundant number, because the sum of its proper divisors (174485502) is greater than itself. Its abundance is 93047292
Bases of 81438210
- Binary: 1001101101010100110000000102
- Hexadecimal: 0x4DAA602
- Base-36: 1CHI4I
Squares and roots of 81438210
- 81438210 squared (814382102) is 6632182048004100
- 81438210 cubed (814382103) is 540113034383587976661000
-
The
square root of 81438210 is 9024.3121621539 -
The
cube root of 81438210 is 433.4537252601
Scales and comparisons
How big is 81438210?- 81,438,210 seconds is equal to 2 years, 30 weeks, 4 days, 13 hours, 43 minutes, 30 seconds.
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To count from 1 to 81,438,210 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 81438210 cubic inches would be around 36.1 feet tall.
Recreational maths with 81438210
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