21970000

Names of 21970000

• Cardinal: 21970000 can be written as Twenty-one million, nine hundred seventy thousand.

Scientific notation

• Scientific notation: 2.197 × 10⁷

Factors of 21970000

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 20

Divisors of 21970000

• Number of divisors d(n): 100
• Complete list of divisors:
  1 2 4 5 8 10 13 16 20 25 26 40 50 52 65 80 100 104 125 130 169 200 208 250 260 325 338 400 500 520 625 650 676 845 1000 1040 1250 1300 1352 1625 1690 2000 2197 2500 2600 2704 3250 3380 4225 4394 5000 5200 6500 6760 8125 8450 8788 10000 10985 13000 13520 16250 16900 17576 21125 21970 26000 32500 33800 35152 42250 43940 54925 65000 67600 84500 87880 105625 109850 130000 169000 175760 211250 219700 274625 338000 422500 439400 549250 845000 878800 1098500 1373125 1690000 2197000 2746250 4394000 5492500 10985000 21970000
• Sum of all divisors σ(n): 57622180
• Sum of proper divisors (its aliquot sum) s(n): 35652180
• 21970000 is an abundant number, because the sum of its proper divisors (35652180) is greater than itself. Its abundance is 13682180

Bases of 21970000

• Binary: 1010011110011110001010000₂
• Hexadecimal: 0x14F3C50
• Base-36: D2W5S

Squares and roots of 21970000

• 21970000 squared (21970000²) is 482680900000000
• 21970000 cubed (21970000³) is 10604499373000000000000
• The square root of 21970000 is 4687.2166581031
• The cube root of 21970000 is 280.0765097041

Scales and comparisons

• 21,970,000 seconds is equal to 36 weeks, 2 days, 6 hours, 46 minutes, 40 seconds.
• To count from 1 to 21,970,000 would take you about two weeks!

  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 21970000 cubic inches would be around 23.3 feet tall.

Recreational maths with 21970000

• 21970000 backwards is 00007912
• The number of decimal digits it has is: 8
• The sum of 21970000's digits is 19
• More coming soon!