21040272

Names of 21040272

• Cardinal: 21040272 can be written as Twenty-one million, forty thousand, two hundred seventy-two.

Scientific notation

• Scientific notation: 2.1040272 × 10⁷

Factors of 21040272

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 412

Divisors of 21040272

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 16 18 22 24 33 36 37 44 48 66 72 74 88 99 111 132 144 148 176 198 222 264 296 333 359 396 407 444 528 592 666 718 792 814 888 1077 1221 1332 1436 1584 1628 1776 2154 2442 2664 2872 3231 3256 3663 3949 4308 4884 5328 5744 6462 6512 7326 7898 8616 9768 11847 12924 13283 14652 15796 17232 19536 23694 25848 26566 29304 31592 35541 39849 47388 51696 53132 58608 63184 71082 79698 94776 106264 119547 142164 146113 159396 189552 212528 239094 284328 292226 318792 438339 478188 568656 584452 637584 876678 956376 1168904 1315017 1753356 1912752 2337808 2630034 3506712 5260068 7013424 10520136 21040272
• Sum of all divisors σ(n): 66156480
• Sum of proper divisors (its aliquot sum) s(n): 45116208
• 21040272 is an abundant number, because the sum of its proper divisors (45116208) is greater than itself. Its abundance is 24075936

Bases of 21040272

• Binary: 1010000010000110010010000₂
• Hexadecimal: 0x1410C90
• Base-36: CIYS0

Squares and roots of 21040272

• 21040272 squared (21040272²) is 442693045833984
• 21040272 cubed (21040272³) is 9314382096855490203648
• The square root of 21040272 is 4586.9676257851
• The cube root of 21040272 is 276.0686659651

Scales and comparisons

• 21,040,272 seconds is equal to 34 weeks, 5 days, 12 hours, 31 minutes, 12 seconds.
• To count from 1 to 21,040,272 would take you about six 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 21040272 cubic inches would be around 23 feet tall.

Recreational maths with 21040272

• 21040272 backwards is 27204012
• 21040272 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21040272's digits is 18
• More coming soon!