1940138209

Names of 1940138209

• Cardinal: 1940138209 can be written as One billion, nine hundred forty million, one hundred thirty-eight thousand, two hundred nine.

Scientific notation

• Scientific notation: 1.940138209 × 10⁹

Factors of 1940138209

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 2608

Divisors of 1940138209

• Number of divisors d(n): 9
• Complete list of divisors:
  1 17 289 2591 44047 748799 6713281 114125777 1940138209
• Sum of all divisors σ(n): 2061773011
• Sum of proper divisors (its aliquot sum) s(n): 121634802
• 1940138209 is a deficient number, because the sum of its proper divisors (121634802) is less than itself. Its deficiency is 1818503407

Bases of 1940138209

• Binary: 1110011101001000010100011100001₂
• Hexadecimal: 0x73A428E1
• Base-36: W33W81

Squares and roots of 1940138209

• 1940138209 squared (1940138209²) is 3764136270021727681
• 1940138209 cubed (1940138209³) is 7302944601351895134101063329
• 1940138209 is a perfect square number. Its square root is 44047
• The cube root of 1940138209 is 1247.2233211975

Scales and comparisons

• 1,940,138,209 seconds is equal to 61 years, 35 weeks, 6 days, 7 hours, 16 minutes, 49 seconds.
• To count from 1 to 1,940,138,209 would take you about one hundred twenty-three 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 1940138209 cubic inches would be around 103.9 feet tall.

Recreational maths with 1940138209

• 1940138209 backwards is 9028310491
• The number of decimal digits it has is: 10
• The sum of 1940138209's digits is 37
• More coming soon!