128789640
128,789,640 is an even composite number composed of five prime numbers multiplied together.
128789640 is an even composite number. It is composed of five distinct prime numbers multiplied together. It has a total of two hundred forty divisors.
Prime factorization of 128789640:
23 × 32 × 5 × 74 × 149
(2 × 2 × 2 × 3 × 3 × 5 × 7 × 7 × 7 × 7 × 149)See below for interesting mathematical facts about the number 128789640 from the Numbermatics database.
Names of 128789640
- Cardinal: 128789640 can be written as One hundred twenty-eight million, seven hundred eighty-nine thousand, six hundred forty.
Scientific notation
- Scientific notation: 1.2878964 × 108
Factors of 128789640
Divisors of 128789640
- Number of divisors d(n): 240
-
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 98 105 120 126 140 147 149 168 180 196 210 245 252 280 294 298 315 343 360 392 420 441 447 490 504 588 596 630 686 735 745 840 882 894 980 1029 1043 1176 1192 1260 1341 1372 1470 1490 1715 1764 1788 1960 2058 2086 2205 2235 2401 2520 2682 2744 2940 2980 3087 3129 3430 3528 3576 4116 4172 4410 4470 4802 5145 5215 5364 5880 5960 6174 6258 6705 6860 7203 7301 8232 8344 8820 8940 9387 9604 10290 10430 10728 12005 12348 12516 13410 13720 14406 14602 15435 15645 17640 17880 18774 19208 20580 20860 21609 21903 24010 24696 25032 26820 28812 29204 30870 31290 36015 36505 37548 41160 41720 43218 43806 46935 48020 51107 53640 57624 58408 61740 62580 65709 72030 73010 75096 86436 87612 93870 96040 102214 108045 109515 123480 125160 131418 144060 146020 153321 172872 175224 187740 204428 216090 219030 255535 262836 288120 292040 306642 328545 357749 375480 408856 432180 438060 459963 511070 525672 613284 657090 715498 766605 864360 876120 919926 1022140 1073247 1226568 1314180 1430996 1533210 1788745 1839852 2044280 2146494 2299815 2628360 2861992 3066420 3219741 3577490 3679704 4292988 4599630 5366235 6132840 6439482 7154980 8585976 9199260 10732470 12878964 14309960 16098705 18398520 21464940 25757928 32197410 42929880 64394820 128789640
- Sum of all divisors σ(n): 491575500
- Sum of proper divisors (its aliquot sum) s(n): 362785860
- 128789640 is an abundant number, because the sum of its proper divisors (362785860) is greater than itself. Its abundance is 233996220
Bases of 128789640
- Binary: 1111010110100101100100010002
- Hexadecimal: 0x7AD2C88
- Base-36: 24OEQ0
Squares and roots of 128789640
- 128789640 squared (1287896402) is 16586771371329600
- 128789640 cubed (1287896403) is 2136204313675845505344000
-
The
square root of 128789640 is 11348.5523305839 -
The
cube root of 128789640 is 505.0026337149
Scales and comparisons
How big is 128789640?- 128,789,640 seconds is equal to 4 years, 4 weeks, 6 days, 14 hours, 54 minutes.
-
To count from 1 to 128,789,640 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 128789640 cubic inches would be around 42.1 feet tall.
Recreational maths with 128789640
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