129421890
129,421,890 is an even composite number composed of six prime numbers multiplied together.
129421890 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 129421890:
2 × 32 × 5 × 132 × 67 × 127
(2 × 3 × 3 × 5 × 13 × 13 × 67 × 127)See below for interesting mathematical facts about the number 129421890 from the Numbermatics database.
Names of 129421890
- Cardinal: 129421890 can be written as One hundred twenty-nine million, four hundred twenty-one thousand, eight hundred ninety.
Scientific notation
- Scientific notation: 1.2942189 × 108
Factors of 129421890
Divisors of 129421890
- Number of divisors d(n): 144
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Complete list of divisors:
1 2 3 5 6 9 10 13 15 18 26 30 39 45 65 67 78 90 117 127 130 134 169 195 201 234 254 335 338 381 390 402 507 585 603 635 670 762 845 871 1005 1014 1143 1170 1206 1270 1521 1651 1690 1742 1905 2010 2286 2535 2613 3015 3042 3302 3810 4355 4953 5070 5226 5715 6030 7605 7839 8255 8509 8710 9906 11323 11430 13065 14859 15210 15678 16510 17018 21463 22646 24765 25527 26130 29718 33969 39195 42545 42926 49530 51054 56615 64389 67938 74295 76581 78390 85090 101907 107315 110617 113230 127635 128778 148590 153162 169845 193167 203814 214630 221234 255270 321945 331851 339690 382905 386334 509535 553085 643890 663702 765810 965835 995553 1019070 1106170 1438021 1659255 1931670 1991106 2876042 3318510 4314063 4977765 7190105 8628126 9955530 12942189 14380210 21570315 25884378 43140630 64710945 129421890
- Sum of all divisors σ(n): 372722688
- Sum of proper divisors (its aliquot sum) s(n): 243300798
- 129421890 is an abundant number, because the sum of its proper divisors (243300798) is greater than itself. Its abundance is 113878908
Bases of 129421890
- Binary: 1111011011011010010010000102
- Hexadecimal: 0x7B6D242
- Base-36: 251YKI
Squares and roots of 129421890
- 129421890 squared (1294218902) is 16750025611172100
- 129421890 cubed (1294218903) is 2167819972146298297269000
-
The
square root of 129421890 is 11376.3742027063 -
The
cube root of 129421890 is 505.8276660601
Scales and comparisons
How big is 129421890?- 129,421,890 seconds is equal to 4 years, 5 weeks, 6 days, 22 hours, 31 minutes, 30 seconds.
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To count from 1 to 129,421,890 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 129421890 cubic inches would be around 42.2 feet tall.
Recreational maths with 129421890
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