21798

Names of 21798

• Cardinal: 21798 can be written as Twenty-one thousand, seven hundred ninety-eight.

Scientific notation

• Scientific notation: 2.1798 × 10⁴

Factors of 21798

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 185

Divisors of 21798

• Number of divisors d(n): 24
• Complete list of divisors:
  1 2 3 6 7 9 14 18 21 42 63 126 173 346 519 1038 1211 1557 2422 3114 3633 7266 10899 21798
• Sum of all divisors σ(n): 54288
• Sum of proper divisors (its aliquot sum) s(n): 32490
• 21798 is an abundant number, because the sum of its proper divisors (32490) is greater than itself. Its abundance is 10692

Bases of 21798

• Binary: 101010100100110₂
• Hexadecimal: 0x5526
• Base-36: GTI

Squares and roots of 21798

• 21798 squared (21798²) is 475152804
• 21798 cubed (21798³) is 10357380821592
• The square root of 21798 is 147.6414575923
• The cube root of 21798 is 27.9343700981

Scales and comparisons

• 21,798 seconds is equal to 6 hours, 3 minutes, 18 seconds.
• To count from 1 to 21,798 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 21798 cubic inches would be around 2.3 feet tall.

Recreational maths with 21798

• 21798 backwards is 89712
• The number of decimal digits it has is: 5
• The sum of 21798's digits is 27
• More coming soon!