21392028

Names of 21392028

• Cardinal: 21392028 can be written as Twenty-one million, three hundred ninety-two thousand and twenty-eight.

Scientific notation

• Scientific notation: 2.1392028 × 10⁷

Factors of 21392028

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 260

Divisors of 21392028

• Number of divisors d(n): 108
• Complete list of divisors:
  1 2 3 4 6 7 9 12 14 18 21 28 36 42 49 63 67 84 98 126 134 147 181 196 201 252 268 294 362 402 441 469 543 588 603 724 804 882 938 1086 1206 1267 1407 1629 1764 1876 2172 2412 2534 2814 3258 3283 3801 4221 5068 5628 6516 6566 7602 8442 8869 9849 11403 12127 13132 15204 16884 17738 19698 22806 24254 26607 29547 35476 36381 39396 45612 48508 53214 59094 72762 79821 84889 106428 109143 118188 145524 159642 169778 218286 254667 319284 339556 436572 509334 594223 764001 1018668 1188446 1528002 1782669 2376892 3056004 3565338 5348007 7130676 10696014 21392028
• Sum of all divisors σ(n): 64194312
• Sum of proper divisors (its aliquot sum) s(n): 42802284
• 21392028 is an abundant number, because the sum of its proper divisors (42802284) is greater than itself. Its abundance is 21410256

Bases of 21392028

• Binary: 1010001100110101010011100₂
• Hexadecimal: 0x1466A9C
• Base-36: CQI70

Squares and roots of 21392028

• 21392028 squared (21392028²) is 457618861952784
• 21392028 cubed (21392028³) is 9789395508222090005952
• The square root of 21392028 is 4625.1516731885
• The cube root of 21392028 is 277.5986306329

Scales and comparisons

• 21,392,028 seconds is equal to 35 weeks, 2 days, 14 hours, 13 minutes, 48 seconds.
• To count from 1 to 21,392,028 would take you about nine hours!

  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 21392028 cubic inches would be around 23.1 feet tall.

Recreational maths with 21392028

• 21392028 backwards is 82029312
• The number of decimal digits it has is: 8
• The sum of 21392028's digits is 27
• More coming soon!