21338240

Names of 21338240

• Cardinal: 21338240 can be written as Twenty-one million, three hundred thirty-eight thousand, two hundred forty.

Scientific notation

• Scientific notation: 2.133824 × 10⁷

Factors of 21338240

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 458

Divisors of 21338240

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 7 8 10 11 14 16 20 22 28 32 35 40 44 55 56 64 70 77 80 88 110 112 128 140 154 160 176 220 224 280 308 320 352 385 433 440 448 560 616 640 704 770 866 880 896 1120 1232 1408 1540 1732 1760 2165 2240 2464 3031 3080 3464 3520 4330 4480 4763 4928 6062 6160 6928 7040 8660 9526 9856 12124 12320 13856 15155 17320 19052 23815 24248 24640 27712 30310 33341 34640 38104 47630 48496 49280 55424 60620 66682 69280 76208 95260 96992 121240 133364 138560 152416 166705 190520 193984 242480 266728 277120 304832 333410 381040 387968 484960 533456 609664 666820 762080 969920 1066912 1333640 1524160 1939840 2133824 2667280 3048320 4267648 5334560 10669120 21338240
• Sum of all divisors σ(n): 63745920
• Sum of proper divisors (its aliquot sum) s(n): 42407680
• 21338240 is an abundant number, because the sum of its proper divisors (42407680) is greater than itself. Its abundance is 21069440

Bases of 21338240

• Binary: 1010001011001100010000000₂
• Hexadecimal: 0x1459880
• Base-36: CPCOW

Squares and roots of 21338240

• 21338240 squared (21338240²) is 455320486297600
• 21338240 cubed (21338240³) is 9715737813534900224000
• The square root of 21338240 is 4619.3332852263
• The cube root of 21338240 is 277.3657711891

Scales and comparisons

• 21,338,240 seconds is equal to 35 weeks, 1 day, 23 hours, 17 minutes, 20 seconds.
• To count from 1 to 21,338,240 would take you about six 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 21338240 cubic inches would be around 23.1 feet tall.

Recreational maths with 21338240

• 21338240 backwards is 04283312
• The number of decimal digits it has is: 8
• The sum of 21338240's digits is 23
• More coming soon!