21303828

Names of 21303828

• Cardinal: 21303828 can be written as Twenty-one million, three hundred three thousand, eight hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1303828 × 10⁷

Factors of 21303828

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 954

Divisors of 21303828

• Number of divisors d(n): 108
• Complete list of divisors:
  1 2 3 4 6 7 9 12 13 14 18 21 26 28 36 39 42 49 52 63 78 84 91 98 117 126 147 156 182 196 234 252 273 294 364 441 468 546 588 637 819 882 929 1092 1274 1638 1764 1858 1911 2548 2787 3276 3716 3822 5574 5733 6503 7644 8361 11148 11466 12077 13006 16722 19509 22932 24154 26012 33444 36231 39018 45521 48308 58527 72462 78036 84539 91042 108693 117054 136563 144924 169078 182084 217386 234108 253617 273126 338156 409689 434772 507234 546252 591773 760851 819378 1014468 1183546 1521702 1638756 1775319 2367092 3043404 3550638 5325957 7101276 10651914 21303828
• Sum of all divisors σ(n): 67534740
• Sum of proper divisors (its aliquot sum) s(n): 46230912
• 21303828 is an abundant number, because the sum of its proper divisors (46230912) is greater than itself. Its abundance is 24927084

Bases of 21303828

• Binary: 1010001010001001000010100₂
• Hexadecimal: 0x1451214
• Base-36: COM50

Squares and roots of 21303828

• 21303828 squared (21303828²) is 453853087453584
• 21303828 cubed (21303828³) is 9668808112380111519552
• The square root of 21303828 is 4615.6070023345
• The cube root of 21303828 is 277.2165891511

Scales and comparisons

• 21,303,828 seconds is equal to 35 weeks, 1 day, 13 hours, 43 minutes, 48 seconds.
• To count from 1 to 21,303,828 would take you about five days!

  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 21303828 cubic inches would be around 23.1 feet tall.

Recreational maths with 21303828

• 21303828 backwards is 82830312
• The number of decimal digits it has is: 8
• The sum of 21303828's digits is 27
• More coming soon!