1345721905

Names of 1345721905

• Cardinal: 1345721905 can be written as One billion, three hundred forty-five million, seven hundred twenty-one thousand, nine hundred five.

Scientific notation

• Scientific notation: 1.345721905 × 10⁹

Factors of 1345721905

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 146696

Divisors of 1345721905

• Number of divisors d(n): 16
• Complete list of divisors:
  1 5 11 55 167 835 1837 9185 146513 732565 1611643 8058215 24467671 122338355 269144381 1345721905
• Sum of all divisors σ(n): 1772233344
• Sum of proper divisors (its aliquot sum) s(n): 426511439
• 1345721905 is a deficient number, because the sum of its proper divisors (426511439) is less than itself. Its deficiency is 919210466

Bases of 1345721905

• Binary: 1010000001101100001011000110001₂
• Hexadecimal: 0x50361631
• Base-36: M97HO1

Squares and roots of 1345721905

• 1345721905 squared (1345721905²) is 1810967445596829025
• 1345721905 cubed (1345721905³) is 2437058560781548617482292625
• The square root of 1345721905 is 36684.0824472959
• The cube root of 1345721905 is 1104.0407596381

Scales and comparisons

• 1,345,721,905 seconds is equal to 42 years, 41 weeks, 11 hours, 38 minutes, 25 seconds.
• To count from 1 to 1,345,721,905 would take you about eighty-five years!

  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 1345721905 cubic inches would be around 92 feet tall.

Recreational maths with 1345721905

• 1345721905 backwards is 5091275431
• The number of decimal digits it has is: 10
• The sum of 1345721905's digits is 37
• More coming soon!