16391

Names of 16391

• Cardinal: 16391 can be written as Sixteen thousand, three hundred ninety-one.

Scientific notation

• Scientific notation: 1.6391 × 10⁴

Factors of 16391

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 480

Divisors of 16391

• Number of divisors d(n): 4
• Complete list of divisors:
  1 37 443 16391
• Sum of all divisors σ(n): 16872
• Sum of proper divisors (its aliquot sum) s(n): 481
• 16391 is a deficient number, because the sum of its proper divisors (481) is less than itself. Its deficiency is 15910

Bases of 16391

• Binary: 100000000000111₂
• Hexadecimal: 0x4007
• Base-36: CNB

Squares and roots of 16391

• 16391 squared (16391²) is 268664881
• 16391 cubed (16391³) is 4403686064471
• The square root of 16391 is 128.0273408299
• The cube root of 16391 is 25.4020334413

Scales and comparisons

• 16,391 seconds is equal to 4 hours, 33 minutes, 11 seconds.
• To count from 1 to 16,391 would take you about four 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 16391 cubic inches would be around 2.1 feet tall.

Recreational maths with 16391

• 16391 backwards is 19361
• The number of decimal digits it has is: 5
• The sum of 16391's digits is 20
• More coming soon!