13129391

Names of 13129391

• Cardinal: 13129391 can be written as Thirteen million, one hundred twenty-nine thousand, three hundred ninety-one.

Scientific notation

• Scientific notation: 1.3129391 × 10⁷

Factors of 13129391

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 16893

Divisors of 13129391

• Number of divisors d(n): 8
• Complete list of divisors:
  1 11 71 781 16811 184921 1193581 13129391
• Sum of all divisors σ(n): 14525568
• Sum of proper divisors (its aliquot sum) s(n): 1396177
• 13129391 is a deficient number, because the sum of its proper divisors (1396177) is less than itself. Its deficiency is 11733214

Bases of 13129391

• Binary: 110010000101011010101111₂
• Hexadecimal: 0xC856AF
• Base-36: 7TEPB

Squares and roots of 13129391

• 13129391 squared (13129391²) is 172380908030881
• 13129391 cubed (13129391³) is 2263256342472476723471
• The square root of 13129391 is 3623.4501514441
• The cube root of 13129391 is 235.9110013455

Scales and comparisons

• 13,129,391 seconds is equal to 21 weeks, 4 days, 23 hours, 3 minutes, 11 seconds.
• To count from 1 to 13,129,391 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 13129391 cubic inches would be around 19.7 feet tall.

Recreational maths with 13129391

• 13129391 backwards is 19392131
• The number of decimal digits it has is: 8
• The sum of 13129391's digits is 29
• More coming soon!