28133978940

Names of 28133978940

• Cardinal: 28133978940 can be written as Twenty-eight billion, one hundred thirty-three million, nine hundred seventy-eight thousand, nine hundred forty.

Scientific notation

• Scientific notation: 2.813397894 × 10¹⁰

Factors of 28133978940

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 12641

Divisors of 28133978940

• Number of divisors d(n): 192
• Complete list of divisors:
  1 2 3 4 5 6 9 10 12 15 18 20 27 30 36 43 45 54 60 86 90 97 108 129 135 172 180 194 215 258 270 291 387 388 430 485 516 540 582 645 774 860 873 970 1161 1164 1290 1455 1548 1746 1935 1940 2322 2580 2619 2910 3492 3870 4171 4365 4644 5238 5805 5820 7740 8342 8730 10476 11610 12491 12513 13095 16684 17460 20855 23220 24982 25026 26190 37473 37539 41710 49964 50052 52380 62455 62565 74946 75078 83420 112419 112617 124910 125130 149892 150156 187365 187695 224838 225234 249820 250260 337257 374730 375390 449676 450468 537113 562095 563085 674514 749460 750780 1074226 1124190 1126170 1211627 1349028 1611339 1686285 2148452 2248380 2252340 2423254 2685565 3222678 3372570 3634881 4834017 4846508 5371130 6058135 6445356 6745140 7269762 8056695 9668034 10742260 10904643 12116270 14502051 14539524 16113390 18174405 19336068 21809286 24170085 24232540 29004102 32226780 32713929 36348810 43618572 48340170 52099961 54523215 58008204 65427858 72510255 72697620 96680340 104199922 109046430 130855716 145020510 156299883 163569645 208399844 218092860 260499805 290041020 312599766 327139290 468899649 520999610 625199532 654278580 781499415 937799298 1041999220 1406698947 1562998830 1875598596 2344498245 2813397894 3125997660 4688996490 5626795788 7033494735 9377992980 14066989470 28133978940
• Sum of all divisors σ(n): 90494046720
• Sum of proper divisors (its aliquot sum) s(n): 62360067780
• 28133978940 is an abundant number, because the sum of its proper divisors (62360067780) is greater than itself. Its abundance is 34226088840

Bases of 28133978940

• Binary: 11010001100111010100111001100111100₂
• Hexadecimal: 0x68CEA733C
• Base-36: CXA8T30

Squares and roots of 28133978940

• 28133978940 squared (28133978940²) is 791520770996363523600
• 28133978940 cubed (28133978940³) is 22268628701784254189546592984000
• The square root of 28133978940 is 167731.8662031757
• The cube root of 28133978940 is 3041.4245884013

Scales and comparisons

• 28,133,978,940 seconds is equal to 894 years, 29 weeks, 5 days, 18 hours, 9 minutes.
• To count from 1 to 28,133,978,940 would take you about one thousand, seven hundred eighty-nine 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 28133978940 cubic inches would be around 253.5 feet tall.

Recreational maths with 28133978940

• 28133978940 backwards is 04987933182
• 28133978940 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 28133978940's digits is 54
• More coming soon!