21438000

Names of 21438000

• Cardinal: 21438000 can be written as Twenty-one million, four hundred thirty-eight thousand.

Scientific notation

• Scientific notation: 2.1438 × 10⁷

Factors of 21438000

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 407

Divisors of 21438000

• Number of divisors d(n): 160
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 27 30 36 40 45 48 50 54 60 72 75 80 90 100 108 120 125 135 144 150 180 200 216 225 240 250 270 300 360 375 397 400 432 450 500 540 600 675 720 750 794 900 1000 1080 1125 1191 1200 1350 1500 1588 1800 1985 2000 2160 2250 2382 2700 3000 3176 3375 3573 3600 3970 4500 4764 5400 5955 6000 6352 6750 7146 7940 9000 9528 9925 10719 10800 11910 13500 14292 15880 17865 18000 19056 19850 21438 23820 27000 28584 29775 31760 35730 39700 42876 47640 49625 53595 54000 57168 59550 71460 79400 85752 89325 95280 99250 107190 119100 142920 148875 158800 171504 178650 198500 214380 238200 267975 285840 297750 357300 397000 428760 446625 476400 535950 595500 714600 794000 857520 893250 1071900 1191000 1339875 1429200 1786500 2143800 2382000 2679750 3573000 4287600 5359500 7146000 10719000 21438000
• Sum of all divisors σ(n): 76989120
• Sum of proper divisors (its aliquot sum) s(n): 55551120
• 21438000 is an abundant number, because the sum of its proper divisors (55551120) is greater than itself. Its abundance is 34113120

Bases of 21438000

• Binary: 1010001110001111000110000₂
• Hexadecimal: 0x1471E30
• Base-36: CRHO0

Squares and roots of 21438000

• 21438000 squared (21438000²) is 459587844000000
• 21438000 cubed (21438000³) is 9852644199672000000000
• The square root of 21438000 is 4630.1187889729
• The cube root of 21438000 is 277.7973438069

Scales and comparisons

• 21,438,000 seconds is equal to 35 weeks, 3 days, 3 hours.
• To count from 1 to 21,438,000 would take you about four 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 21438000 cubic inches would be around 23.1 feet tall.

Recreational maths with 21438000

• 21438000 backwards is 00083412
• 21438000 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21438000's digits is 18
• More coming soon!