21997008

Names of 21997008

• Cardinal: 21997008 can be written as Twenty-one million, nine hundred ninety-seven thousand and eight.

Scientific notation

• Scientific notation: 2.1997008 × 10⁷

Factors of 21997008

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 1559

Divisors of 21997008

• Number of divisors d(n): 100
• Complete list of divisors:
  1 2 3 4 6 8 9 11 12 16 18 22 24 27 33 36 44 48 54 66 72 81 88 99 108 132 144 162 176 198 216 264 297 324 396 432 528 594 648 792 891 1188 1296 1543 1584 1782 2376 3086 3564 4629 4752 6172 7128 9258 12344 13887 14256 16973 18516 24688 27774 33946 37032 41661 50919 55548 67892 74064 83322 101838 111096 124983 135784 152757 166644 203676 222192 249966 271568 305514 333288 407352 458271 499932 611028 666576 814704 916542 999864 1222056 1374813 1833084 1999728 2444112 2749626 3666168 5499252 7332336 10998504 21997008
• Sum of all divisors σ(n): 69498528
• Sum of proper divisors (its aliquot sum) s(n): 47501520
• 21997008 is an abundant number, because the sum of its proper divisors (47501520) is greater than itself. Its abundance is 25504512

Bases of 21997008

• Binary: 1010011111010010111010000₂
• Hexadecimal: 0x14FA5D0
• Base-36: D3H00

Squares and roots of 21997008

• 21997008 squared (21997008²) is 483868360952064
• 21997008 cubed (21997008³) is 10643656206809439424512
• The square root of 21997008 is 4690.0968007065
• The cube root of 21997008 is 280.1912299113

Scales and comparisons

• 21,997,008 seconds is equal to 36 weeks, 2 days, 14 hours, 16 minutes, 48 seconds.
• To count from 1 to 21,997,008 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 21997008 cubic inches would be around 23.3 feet tall.

Recreational maths with 21997008

• 21997008 backwards is 80079912
• 21997008 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 21997008's digits is 36
• More coming soon!