1221489920
1,221,489,920 is an even composite number composed of four prime numbers multiplied together.
1221489920 is an even composite number. It is composed of four distinct prime numbers multiplied together. It has a total of seventy-two divisors.
Prime factorization of 1221489920:
28 × 5 × 7 × 136327
(2 × 2 × 2 × 2 × 2 × 2 × 2 × 2 × 5 × 7 × 136327)See below for interesting mathematical facts about the number 1221489920 from the Numbermatics database.
Names of 1221489920
- Cardinal: 1221489920 can be written as One billion, two hundred twenty-one million, four hundred eighty-nine thousand, nine hundred twenty.
Scientific notation
- Scientific notation: 1.22148992 × 109
Factors of 1221489920
Divisors of 1221489920
- Number of divisors d(n): 72
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Complete list of divisors:
1 2 4 5 7 8 10 14 16 20 28 32 35 40 56 64 70 80 112 128 140 160 224 256 280 320 448 560 640 896 1120 1280 1792 2240 4480 8960 136327 272654 545308 681635 954289 1090616 1363270 1908578 2181232 2726540 3817156 4362464 4771445 5453080 7634312 8724928 9542890 10906160 15268624 17449856 19085780 21812320 30537248 34899712 38171560 43624640 61074496 76343120 87249280 122148992 152686240 174498560 244297984 305372480 610744960 1221489920
- Sum of all divisors σ(n): 3343853184
- Sum of proper divisors (its aliquot sum) s(n): 2122363264
- 1221489920 is an abundant number, because the sum of its proper divisors (2122363264) is greater than itself. Its abundance is 900873344
Bases of 1221489920
- Binary: 10010001100111001110101000000002
- Hexadecimal: 0x48CE7500
- Base-36: K78RNK
Squares and roots of 1221489920
- 1221489920 squared (12214899202) is 1492037624661606400
- 1221489920 cubed (12214899203) is 1822508918784895628607488000
-
The
square root of 1221489920 is 34949.8200281489 -
The
cube root of 1221489920 is 1068.9645323813
Scales and comparisons
How big is 1221489920?- 1,221,489,920 seconds is equal to 38 years, 43 weeks, 4 days, 14 hours, 45 minutes, 20 seconds.
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To count from 1 to 1,221,489,920 would take you about seventy-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 1221489920 cubic inches would be around 89.1 feet tall.
Recreational maths with 1221489920
- 1221489920 backwards is 0299841221
- The number of decimal digits it has is: 10
- The sum of 1221489920's digits is 38
- More coming soon!
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The information we have on file for 1221489920 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!
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