13129989

Names of 13129989

• Cardinal: 13129989 can be written as Thirteen million, one hundred twenty-nine thousand, nine hundred eighty-nine.

Scientific notation

• Scientific notation: 1.3129989 × 10⁷

Factors of 13129989

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 4376666

Divisors of 13129989

• Number of divisors d(n): 4
• Complete list of divisors:
  1 3 4376663 13129989
• Sum of all divisors σ(n): 17506656
• Sum of proper divisors (its aliquot sum) s(n): 4376667
• 13129989 is a deficient number, because the sum of its proper divisors (4376667) is less than itself. Its deficiency is 8753322

Bases of 13129989

• Binary: 110010000101100100000101₂
• Hexadecimal: 0xC85905
• Base-36: 7TF5X

Squares and roots of 13129989

• 13129989 squared (13129989²) is 172396611140121
• 13129989 cubed (13129989³) is 2263565607907066188669
• The square root of 13129989 is 3623.5326685433
• The cube root of 13129989 is 235.9145829443

Scales and comparisons

• 13,129,989 seconds is equal to 21 weeks, 4 days, 23 hours, 13 minutes, 9 seconds.
• To count from 1 to 13,129,989 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 13129989 cubic inches would be around 19.7 feet tall.

Recreational maths with 13129989

• 13129989 backwards is 98992131
• The number of decimal digits it has is: 8
• The sum of 13129989's digits is 42
• More coming soon!