13187139

Names of 13187139

• Cardinal: 13187139 can be written as Thirteen million, one hundred eighty-seven thousand, one hundred thirty-nine.

Scientific notation

• Scientific notation: 1.3187139 × 10⁷

Factors of 13187139

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 2554

Divisors of 13187139

• Number of divisors d(n): 16
• Complete list of divisors:
  1 3 7 21 277 831 1939 2267 5817 6801 15869 47607 627959 1883877 4395713 13187139
• Sum of all divisors σ(n): 20176128
• Sum of proper divisors (its aliquot sum) s(n): 6988989
• 13187139 is a deficient number, because the sum of its proper divisors (6988989) is less than itself. Its deficiency is 6198150

Bases of 13187139

• Binary: 110010010011100001000011₂
• Hexadecimal: 0xC93843
• Base-36: 7UN9F

Squares and roots of 13187139

• 13187139 squared (13187139²) is 173900635005321
• 13187139 cubed (13187139³) is 2293251846003433766619
• The square root of 13187139 is 3631.4100567135
• The cube root of 13187139 is 236.2563705905

Scales and comparisons

• 13,187,139 seconds is equal to 21 weeks, 5 days, 15 hours, 5 minutes, 39 seconds.
• To count from 1 to 13,187,139 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 13187139 cubic inches would be around 19.7 feet tall.

Recreational maths with 13187139

• 13187139 backwards is 93178131
• The number of decimal digits it has is: 8
• The sum of 13187139's digits is 33
• More coming soon!