21208

Names of 21208

• Cardinal: 21208 can be written as Twenty-one thousand, two hundred eight.

Scientific notation

• Scientific notation: 2.1208 × 10⁴

Factors of 21208

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 254

Divisors of 21208

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 4 8 11 22 44 88 241 482 964 1928 2651 5302 10604 21208
• Sum of all divisors σ(n): 43560
• Sum of proper divisors (its aliquot sum) s(n): 22352
• 21208 is an abundant number, because the sum of its proper divisors (22352) is greater than itself. Its abundance is 1144

Bases of 21208

• Binary: 101001011011000₂
• Hexadecimal: 0x52D8
• Base-36: GD4

Squares and roots of 21208

• 21208 squared (21208²) is 449779264
• 21208 cubed (21208³) is 9538918630912
• The square root of 21208 is 145.6296673071
• The cube root of 21208 is 27.6800309621

Scales and comparisons

• 21,208 seconds is equal to 5 hours, 53 minutes, 28 seconds.
• To count from 1 to 21,208 would take you about five 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 21208 cubic inches would be around 2.3 feet tall.

Recreational maths with 21208

• 21208 backwards is 80212
• The number of decimal digits it has is: 5
• The sum of 21208's digits is 13
• More coming soon!