21385800

Names of 21385800

• Cardinal: 21385800 can be written as Twenty-one million, three hundred eighty-five thousand, eight hundred.

Scientific notation

• Scientific notation: 2.13858 × 10⁷

Factors of 21385800

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 119

Divisors of 21385800

• Number of divisors d(n): 108
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 18 20 24 25 30 36 40 45 50 60 72 75 90 100 109 120 150 180 200 218 225 300 327 360 436 450 545 600 654 872 900 981 1090 1308 1635 1800 1962 2180 2616 2725 3270 3924 4360 4905 5450 6540 7848 8175 9810 10900 11881 13080 16350 19620 21800 23762 24525 32700 35643 39240 47524 49050 59405 65400 71286 95048 98100 106929 118810 142572 178215 196200 213858 237620 285144 297025 356430 427716 475240 534645 594050 712860 855432 891075 1069290 1188100 1425720 1782150 2138580 2376200 2673225 3564300 4277160 5346450 7128600 10692900 21385800
• Sum of all divisors σ(n): 72485595
• Sum of proper divisors (its aliquot sum) s(n): 51099795
• 21385800 is an abundant number, because the sum of its proper divisors (51099795) is greater than itself. Its abundance is 29713995

Bases of 21385800

• Binary: 1010001100101001001001000₂
• Hexadecimal: 0x1465248
• Base-36: CQDE0

Squares and roots of 21385800

• 21385800 squared (21385800²) is 457352441640000
• 21385800 cubed (21385800³) is 9780847846424712000000
• The square root of 21385800 is 4624.4783489601
• The cube root of 21385800 is 277.5716883207

Scales and comparisons

• 21,385,800 seconds is equal to 35 weeks, 2 days, 12 hours, 30 minutes.
• To count from 1 to 21,385,800 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 21385800 cubic inches would be around 23.1 feet tall.

Recreational maths with 21385800

• 21385800 backwards is 00858312
• The number of decimal digits it has is: 8
• The sum of 21385800's digits is 27
• More coming soon!