68990040
68,990,040 is an even composite number composed of five prime numbers multiplied together.
68990040 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 68990040:
23 × 32 × 5 × 72 × 3911
(2 × 2 × 2 × 3 × 3 × 5 × 7 × 7 × 3911)See below for interesting mathematical facts about the number 68990040 from the Numbermatics database.
Names of 68990040
- Cardinal: 68990040 can be written as Sixty-eight million, nine hundred ninety thousand and forty.
Scientific notation
- Scientific notation: 6.899004 × 107
Factors of 68990040
Divisors of 68990040
- Number of divisors d(n): 144
-
Complete list of divisors:
1 2 3 4 5 6 7 8 9 10 12 14 15 18 20 21 24 28 30 35 36 40 42 45 49 56 60 63 70 72 84 90 98 105 120 126 140 147 168 180 196 210 245 252 280 294 315 360 392 420 441 490 504 588 630 735 840 882 980 1176 1260 1470 1764 1960 2205 2520 2940 3528 3911 4410 5880 7822 8820 11733 15644 17640 19555 23466 27377 31288 35199 39110 46932 54754 58665 70398 78220 82131 93864 109508 117330 136885 140796 156440 164262 175995 191639 219016 234660 246393 273770 281592 328524 351990 383278 410655 469320 492786 547540 574917 657048 703980 766556 821310 958195 985572 1095080 1149834 1231965 1407960 1533112 1642620 1724751 1916390 1971144 2299668 2463930 2874585 3285240 3449502 3832780 4599336 4927860 5749170 6899004 7665560 8623755 9855720 11498340 13798008 17247510 22996680 34495020 68990040
- Sum of all divisors σ(n): 260891280
- Sum of proper divisors (its aliquot sum) s(n): 191901240
- 68990040 is an abundant number, because the sum of its proper divisors (191901240) is greater than itself. Its abundance is 122911200
Bases of 68990040
- Binary: 1000001110010110100010110002
- Hexadecimal: 0x41CB458
- Base-36: 152P20
Squares and roots of 68990040
- 68990040 squared (689900402) is 4759625619201600
- 68990040 cubed (689900403) is 328366761853743152064000
-
The
square root of 68990040 is 8306.0243197333 -
The
cube root of 68990040 is 410.1368569497
Scales and comparisons
How big is 68990040?- 68,990,040 seconds is equal to 2 years, 10 weeks, 11 hours, 54 minutes.
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To count from 1 to 68,990,040 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 68990040 cubic inches would be around 34.2 feet tall.
Recreational maths with 68990040
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