642221439

Names of 642221439

• Cardinal: 642221439 can be written as Six hundred forty-two million, two hundred twenty-one thousand, four hundred thirty-nine.

Scientific notation

• Scientific notation: 6.42221439 × 10⁸

Factors of 642221439

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 1436889

Divisors of 642221439

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 149 447 1436737 4310211 214073813 642221439
• Sum of all divisors σ(n): 862042800
• Sum of proper divisors (its aliquot sum) s(n): 219821361
• 642221439 is a deficient number, because the sum of its proper divisors (219821361) is less than itself. Its deficiency is 422400078

Bases of 642221439

• Binary: 100110010001111000010101111111₂
• Hexadecimal: 0x2647857F
• Base-36: AMD18F

Squares and roots of 642221439

• 642221439 squared (642221439²) is 412448376711230721
• 642221439 cubed (642221439³) is 264883190004700681101627519
• The square root of 642221439 is 25342.0882920095
• The cube root of 642221439 is 862.7697965461

Scales and comparisons

• 642,221,439 seconds is equal to 20 years, 21 weeks, 6 days, 2 hours, 50 minutes, 39 seconds.
• To count from 1 to 642,221,439 would take you about thirty 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 642221439 cubic inches would be around 71.9 feet tall.

Recreational maths with 642221439

• 642221439 backwards is 934122246
• The number of decimal digits it has is: 9
• The sum of 642221439's digits is 33
• More coming soon!