13138891

Names of 13138891

• Cardinal: 13138891 can be written as Thirteen million, one hundred thirty-eight thousand, eight hundred ninety-one.

Scientific notation

• Scientific notation: 1.3138891 × 10⁷

Factors of 13138891

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 13138891

Divisors of 13138891

• Number of divisors d(n): 2
• Complete list of divisors:
  1 13138891
• Sum of all divisors σ(n): 13138892
• Sum of proper divisors (its aliquot sum) s(n): 1
• 13138891 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 13138890

Bases of 13138891

• Binary: 110010000111101111001011₂
• Hexadecimal: 0xC87BCB
• Base-36: 7TM17

Squares and roots of 13138891

• 13138891 squared (13138891²) is 172630456709881
• 13138891 cubed (13138891³) is 2268172753991345081971
• The square root of 13138891 is 3624.7608196955
• The cube root of 13138891 is 235.9678868017

Scales and comparisons

• 13,138,891 seconds is equal to 21 weeks, 5 days, 1 hour, 41 minutes, 31 seconds.
• To count from 1 to 13,138,891 would take you about thirty-two weeks!

  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 13138891 cubic inches would be around 19.7 feet tall.

Recreational maths with 13138891

• 13138891 backwards is 19883131
• The number of decimal digits it has is: 8
• The sum of 13138891's digits is 34
• More coming soon!