129729420
129,729,420 is an even composite number composed of six prime numbers multiplied together.
129729420 is an even composite number. It is composed of six distinct prime numbers multiplied together. It has a total of one hundred forty-four divisors.
Prime factorization of 129729420:
22 × 32 × 5 × 31 × 67 × 347
(2 × 2 × 3 × 3 × 5 × 31 × 67 × 347)See below for interesting mathematical facts about the number 129729420 from the Numbermatics database.
Names of 129729420
- Cardinal: 129729420 can be written as One hundred twenty-nine million, seven hundred twenty-nine thousand, four hundred twenty.
Scientific notation
- Scientific notation: 1.2972942 × 108
Factors of 129729420
Divisors of 129729420
- Number of divisors d(n): 144
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Complete list of divisors:
1 2 3 4 5 6 9 10 12 15 18 20 30 31 36 45 60 62 67 90 93 124 134 155 180 186 201 268 279 310 335 347 372 402 465 558 603 620 670 694 804 930 1005 1041 1116 1206 1340 1388 1395 1735 1860 2010 2077 2082 2412 2790 3015 3123 3470 4020 4154 4164 5205 5580 6030 6231 6246 6940 8308 10385 10410 10757 12060 12462 12492 15615 18693 20770 20820 21514 23249 24924 31155 31230 32271 37386 41540 43028 46498 53785 62310 62460 64542 69747 74772 92996 93465 96813 107570 116245 124620 129084 139494 161355 186930 193626 209241 215140 232490 278988 322710 348735 373860 387252 418482 464980 484065 645420 697470 720719 836964 968130 1046205 1394940 1441438 1936260 2092410 2162157 2882876 3603595 4184820 4324314 6486471 7207190 8648628 10810785 12972942 14414380 21621570 25945884 32432355 43243140 64864710 129729420
- Sum of all divisors σ(n): 413457408
- Sum of proper divisors (its aliquot sum) s(n): 283727988
- 129729420 is an abundant number, because the sum of its proper divisors (283727988) is greater than itself. Its abundance is 153998568
Bases of 129729420
- Binary: 1111011101110000011100011002
- Hexadecimal: 0x7BB838C
- Base-36: 258JV0
Squares and roots of 129729420
- 129729420 squared (1297294202) is 16829722413536400
- 129729420 cubed (1297294203) is 2183310127469077320888000
-
The
square root of 129729420 is 11389.8823523337 -
The
cube root of 129729420 is 506.2279953855
Scales and comparisons
How big is 129729420?- 129,729,420 seconds is equal to 4 years, 6 weeks, 3 days, 11 hours, 57 minutes.
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To count from 1 to 129,729,420 would take you about six 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 129729420 cubic inches would be around 42.2 feet tall.
Recreational maths with 129729420
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