28212657720

Names of 28212657720

• Cardinal: 28212657720 can be written as Twenty-eight billion, two hundred twelve million, six hundred fifty-seven thousand, seven hundred twenty.

Scientific notation

• Scientific notation: 2.821265772 × 10¹⁰

Factors of 28212657720

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 20261

Divisors of 28212657720

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 3 4 5 6 8 10 12 13 15 20 24 26 30 39 40 52 60 65 78 104 120 130 156 195 260 312 390 520 780 937 1560 1874 2811 3748 4685 5622 7496 9370 11244 12181 14055 18740 19301 22488 24362 28110 36543 37480 38602 48724 56220 57903 60905 73086 77204 96505 97448 112440 115806 121810 146172 154408 182715 193010 231612 243620 250913 289515 292344 365430 386020 463224 487240 501826 579030 730860 752739 772040 1003652 1158060 1254565 1461720 1505478 2007304 2316120 2509130 3010956 3763695 5018260 6021912 7527390 10036520 15054780 18085037 30109560 36170074 54255111 72340148 90425185 108510222 144680296 180850370 217020444 235105481 271275555 361700740 434040888 470210962 542551110 705316443 723401480 940421924 1085102220 1175527405 1410632886 1880843848 2170204440 2351054810 2821265772 3526582215 4702109620 5642531544 7053164430 9404219240 14106328860 28212657720
• Sum of all divisors σ(n): 91250591040
• Sum of proper divisors (its aliquot sum) s(n): 63037933320
• 28212657720 is an abundant number, because the sum of its proper divisors (63037933320) is greater than itself. Its abundance is 34825275600

Bases of 28212657720

• Binary: 11010010001100110101111111000111000₂
• Hexadecimal: 0x6919AFE38
• Base-36: CYL360O

Squares and roots of 28212657720

• 28212657720 squared (28212657720²) is 795954055625875598400
• 28212657720 cubed (28212657720³) is 22455979332218668632959379648000
• The square root of 28212657720 is 167966.2398221737
• The cube root of 28212657720 is 3044.2571401373

Scales and comparisons

• 28,212,657,720 seconds is equal to 897 years, 3 weeks, 6 days, 9 hours, 22 minutes.
• To count from 1 to 28,212,657,720 would take you about one thousand, seven hundred ninety-four 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 28212657720 cubic inches would be around 253.7 feet tall.

Recreational maths with 28212657720

• 28212657720 backwards is 02775621282
• The number of decimal digits it has is: 11
• The sum of 28212657720's digits is 42
• More coming soon!