128129040

Names of 128129040

• Cardinal: 128129040 can be written as One hundred twenty-eight million, one hundred twenty-nine thousand and forty.

Scientific notation

• Scientific notation: 1.2812904 × 10⁸

Factors of 128129040

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 23

Divisors of 128129040

• Number of divisors d(n): 280
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 13 15 16 18 20 24 26 27 30 36 39 40 45 48 52 54 60 65 72 78 80 81 90 104 108 117 120 130 135 144 156 162 169 180 195 208 216 234 240 243 260 270 312 324 338 351 360 390 405 432 468 486 507 520 540 585 624 648 676 702 720 729 780 810 845 936 972 1014 1040 1053 1080 1170 1215 1296 1352 1404 1458 1521 1560 1620 1690 1755 1872 1944 2028 2106 2160 2197 2340 2430 2535 2704 2808 2916 3042 3120 3159 3240 3380 3510 3645 3888 4056 4212 4394 4563 4680 4860 5070 5265 5616 5832 6084 6318 6480 6591 6760 7020 7290 7605 8112 8424 8788 9126 9360 9477 9720 10140 10530 10985 11664 12168 12636 13182 13520 13689 14040 14580 15210 15795 16848 17576 18252 18954 19440 19773 20280 21060 21970 22815 24336 25272 26364 27378 28080 29160 30420 31590 32955 35152 36504 37908 39546 40560 41067 42120 43940 45630 47385 50544 52728 54756 58320 59319 60840 63180 65910 68445 73008 75816 79092 82134 84240 87880 91260 94770 98865 105456 109512 118638 121680 123201 126360 131820 136890 151632 158184 164268 175760 177957 182520 189540 197730 205335 219024 237276 246402 252720 263640 273780 296595 316368 328536 355914 365040 379080 395460 410670 474552 492804 527280 533871 547560 593190 616005 657072 711828 758160 790920 821340 889785 949104 985608 1067742 1095120 1186380 1232010 1423656 1581840 1601613 1642680 1779570 1971216 2135484 2372760 2464020 2669355 2847312 3203226 3285360 3559140 4270968 4745520 4928040 5338710 6406452 7118280 8008065 8541936 9856080 10677420 12812904 14236560 16016130 21354840 25625808 32032260 42709680 64064520 128129040
• Sum of all divisors σ(n): 483849240
• Sum of proper divisors (its aliquot sum) s(n): 355720200
• 128129040 is an abundant number, because the sum of its proper divisors (355720200) is greater than itself. Its abundance is 227591160

Bases of 128129040

• Binary: 111101000110001100000010000₂
• Hexadecimal: 0x7A31810
• Base-36: 24A900

Squares and roots of 128129040

• 128129040 squared (128129040²) is 16417050891321600
• 128129040 cubed (128129040³) is 2103500970336180939264000
• The square root of 128129040 is 11319.4098786109
• The cube root of 128129040 is 504.1377174675

Scales and comparisons

• 128,129,040 seconds is equal to 4 years, 3 weeks, 5 days, 23 hours, 24 minutes.
• To count from 1 to 128,129,040 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 128129040 cubic inches would be around 42 feet tall.

Recreational maths with 128129040

• 128129040 backwards is 040921821
• 128129040 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 128129040's digits is 27
• More coming soon!