28721138355

Names of 28721138355

• Cardinal: 28721138355 can be written as Twenty-eight billion, seven hundred twenty-one million, one hundred thirty-eight thousand, three hundred fifty-five.

Scientific notation

• Scientific notation: 2.8721138355 × 10¹⁰

Factors of 28721138355

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 14
• Sum of prime factors: 1097

Divisors of 28721138355

• Number of divisors d(n): 176
• Complete list of divisors:
  1 3 5 7 9 13 15 21 27 35 39 45 63 65 81 91 105 117 135 189 195 243 273 315 351 405 455 567 585 729 819 945 1053 1069 1215 1365 1701 1755 2187 2457 2835 3159 3207 3645 4095 5103 5265 5345 6561 7371 7483 8505 9477 9621 10935 12285 13897 15309 15795 16035 19683 22113 22449 25515 28431 28863 32805 36855 37415 41691 45927 47385 48105 59049 66339 67347 69485 76545 85293 86589 97279 98415 110565 112245 125073 137781 142155 144315 199017 202041 208455 229635 255879 259767 291837 295245 331695 336735 375219 413343 426465 432945 486395 597051 606123 625365 688905 767637 779301 875511 995085 1010205 1125657 1279395 1298835 1459185 1791153 1818369 1876095 2066715 2337903 2626533 2985255 3030615 3376971 3838185 3896505 4377555 5373459 5455107 5628285 7013709 7879599 8955765 9091845 10130913 11689515 13132665 16365321 16884855 21041127 23638797 26867295 27275535 30392739 35068545 39397995 49095963 50654565 63123381 70916391 81826605 91178217 105205635 118193985 147287889 151963695 212749173 245479815 273534651 315616905 354581955 441863667 455891085 638247519 736439445 820603953 1063745865 1367673255 1914742557 2209318335 3191237595 4103019765 5744227671 9573712785 28721138355
• Sum of all divisors σ(n): 63687529920
• Sum of proper divisors (its aliquot sum) s(n): 34966391565
• 28721138355 is an abundant number, because the sum of its proper divisors (34966391565) is greater than itself. Its abundance is 6245253210

Bases of 28721138355

• Binary: 11010101111111010011100101010110011₂
• Hexadecimal: 0x6AFE9CAB3
• Base-36: D6ZTO6R

Squares and roots of 28721138355

• 28721138355 squared (28721138355²) is 824903788407052106025
• 28721138355 cubed (28721138355³) is 23692175836402588594838154088875
• The square root of 28721138355 is 169473.1198597583
• The cube root of 28721138355 is 3062.4373746571

Scales and comparisons

• 28,721,138,355 seconds is equal to 913 years, 12 weeks, 4 days, 13 hours, 59 minutes, 15 seconds.
• To count from 1 to 28,721,138,355 would take you about one thousand, eight hundred twenty-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 28721138355 cubic inches would be around 255.2 feet tall.

Recreational maths with 28721138355

• 28721138355 backwards is 55383112782
• 28721138355 is a Harshad number.
• The number of decimal digits it has is: 11
• The sum of 28721138355's digits is 45
• More coming soon!