21628

Names of 21628

• Cardinal: 21628 can be written as Twenty-one thousand, six hundred twenty-eight.

Scientific notation

• Scientific notation: 2.1628 × 10⁴

Factors of 21628

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 5409

Divisors of 21628

• Number of divisors d(n): 6
• Complete list of divisors:
  1 2 4 5407 10814 21628
• Sum of all divisors σ(n): 37856
• Sum of proper divisors (its aliquot sum) s(n): 16228
• 21628 is a deficient number, because the sum of its proper divisors (16228) is less than itself. Its deficiency is 5400

Bases of 21628

• Binary: 101010001111100₂
• Hexadecimal: 0x547C
• Base-36: GOS

Squares and roots of 21628

• 21628 squared (21628²) is 467770384
• 21628 cubed (21628³) is 10116937865152
• The square root of 21628 is 147.0646116507
• The cube root of 21628 is 27.8615615545

Scales and comparisons

• 21,628 seconds is equal to 6 hours, 28 seconds.
• To count from 1 to 21,628 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 21628 cubic inches would be around 2.3 feet tall.

Recreational maths with 21628

• 21628 backwards is 82612
• The number of decimal digits it has is: 5
• The sum of 21628's digits is 19
• More coming soon!