21028855

Names of 21028855

• Cardinal: 21028855 can be written as Twenty-one million, twenty-eight thousand, eight hundred fifty-five.

Scientific notation

• Scientific notation: 2.1028855 × 10⁷

Factors of 21028855

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 9665

Divisors of 21028855

• Number of divisors d(n): 8
• Complete list of divisors:
  1 5 457 2285 9203 46015 4205771 21028855
• Sum of all divisors σ(n): 25292592
• Sum of proper divisors (its aliquot sum) s(n): 4263737
• 21028855 is a deficient number, because the sum of its proper divisors (4263737) is less than itself. Its deficiency is 16765118

Bases of 21028855

• Binary: 1010000001101111111110111₂
• Hexadecimal: 0x140DFF7
• Base-36: CIPYV

Squares and roots of 21028855

• 21028855 squared (21028855²) is 442212742611025
• 21028855 cubed (21028855³) is 9299227643519566126375
• The square root of 21028855 is 4585.7229528177
• The cube root of 21028855 is 276.0187229125

Scales and comparisons

• 21,028,855 seconds is equal to 34 weeks, 5 days, 9 hours, 20 minutes, 55 seconds.
• To count from 1 to 21,028,855 would take you about two 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 21028855 cubic inches would be around 23 feet tall.

Recreational maths with 21028855

• 21028855 backwards is 55882012
• The number of decimal digits it has is: 8
• The sum of 21028855's digits is 31
• More coming soon!