129215672820

Names of 129215672820

• Cardinal: 129215672820 can be written as One hundred twenty-nine billion, two hundred fifteen million, six hundred seventy-two thousand, eight hundred twenty.

Scientific notation

• Scientific notation: 1.2921567282 × 10¹¹

Factors of 129215672820

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 13
• Sum of prime factors: 252

Divisors of 129215672820

• Number of divisors d(n): 378
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 13 15 18 20 26 27 30 36 39 45 52 54 60 65 78 81 90 108 117 130 135 156 162 169 180 195 229 234 243 260 270 324 338 351 390 405 458 468 486 507 540 585 676 687 702 729 780 810 845 916 972 1014 1053 1145 1170 1215 1374 1404 1458 1521 1620 1690 1755 2028 2061 2106 2290 2340 2430 2535 2748 2916 2977 3042 3159 3380 3435 3510 3645 4122 4212 4563 4580 4860 5070 5265 5954 6084 6183 6318 6870 7020 7290 7605 8244 8931 9126 9477 10140 10305 10530 11908 12366 12636 13689 13740 14580 14885 15210 15795 17862 18252 18549 18954 20610 21060 22815 24732 26793 27378 29770 30420 30915 31590 35724 37098 37908 38701 41067 41220 44655 45630 47385 52441 53586 54756 55647 59540 61830 63180 68445 74196 77402 80379 82134 89310 91260 92745 94770 104882 107172 111294 116103 123201 123660 133965 136890 154804 157323 160758 164268 166941 178620 185490 189540 193505 205335 209764 222588 232206 241137 246402 262205 267930 273780 278235 314646 321516 333882 348309 370980 387010 401895 410670 464412 471969 482274 492804 524410 535860 556470 580515 616005 629292 667764 681733 696618 723411 774020 786615 803790 821340 834705 943938 964548 1044927 1048820 1112940 1161030 1205685 1232010 1363466 1393236 1415907 1446822 1573230 1607580 1669410 1741545 1887876 2045199 2089854 2170233 2322060 2359845 2411370 2464020 2726932 2831814 2893644 3134781 3146460 3338820 3408665 3483090 3617055 4090398 4179708 4247721 4340466 4719690 4822740 5224635 5663628 6135597 6269562 6817330 6966180 7079535 7234110 8180796 8495442 8680932 8862529 9404343 9439380 10225995 10449270 10851165 12271194 12539124 12743163 13634660 14159070 14468220 15673905 16990884 17725058 18406791 18808686 20451990 20898540 21238605 21702330 24542388 25486326 26587587 28213029 28318140 30677985 31347810 35450116 36813582 37617372 38229489 40903980 42477210 43404660 44312645 47021715 50972652 53175174 55220373 56426058 61355970 62695620 63715815 73627164 76458978 79762761 84954420 88625290 92033955 94043430 106350348 110440746 112852116 122711940 127431630 132937935 141065145 152917956 159525522 165661119 177250580 184067910 188086860 191147445 220881492 239288283 254863260 265875870 276101865 282130290 319051044 331322238 368135820 382294890 398813805 478576566 496983357 531751740 552203730 564260580 662644476 717864849 764589780 797627610 828305595 957153132 993966714 1104407460 1196441415 1435729698 1595255220 1656611190 1987933428 2153594547 2392882830 2484916785 2871459396 3313222380 3589324245 4307189094 4785765660 4969833570 6460783641 7178648490 8614378188 9939667140 10767972735 12921567282 14357296980 21535945470 25843134564 32303918205 43071890940 64607836410 129215672820
• Sum of all divisors σ(n): 442478431458
• Sum of proper divisors (its aliquot sum) s(n): 313262758638
• 129215672820 is an abundant number, because the sum of its proper divisors (313262758638) is greater than itself. Its abundance is 184047085818

Bases of 129215672820

• Binary: 1111000010101110110101011000111110100₂
• Hexadecimal: 0x1E15DAB1F4
• Base-36: 1NCZOB90

Squares and roots of 129215672820

• 129215672820 squared (129215672820²) is 16696690102325286752400
• 129215672820 cubed (129215672820³) is 2157474045438996574210798749768000
• The square root of 129215672820 is 359465.8159269111
• The cube root of 129215672820 is 5055.5886607659

Scales and comparisons

• 129,215,672,820 seconds is equal to 4,108 years, 34 weeks, 1 day, 18 hours, 27 minutes.
• To count from 1 to 129,215,672,820 would take you about eight thousand, two hundred seventeen 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 129215672820 cubic inches would be around 421.3 feet tall.

Recreational maths with 129215672820

• 129215672820 backwards is 028276512921
• 129215672820 is a Harshad number.
• The number of decimal digits it has is: 12
• The sum of 129215672820's digits is 45
• More coming soon!