1491123989

Names of 1491123989

• Cardinal: 1491123989 can be written as One billion, four hundred ninety-one million, one hundred twenty-three thousand, nine hundred eighty-nine.

Scientific notation

• Scientific notation: 1.491123989 × 10⁹

Factors of 1491123989

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 251370

Divisors of 1491123989

• Number of divisors d(n): 4
• Complete list of divisors:
  1 6079 245291 1491123989
• Sum of all divisors σ(n): 1491375360
• Sum of proper divisors (its aliquot sum) s(n): 251371
• 1491123989 is a deficient number, because the sum of its proper divisors (251371) is less than itself. Its deficiency is 1490872618

Bases of 1491123989

• Binary: 1011000111000001011111100010101₂
• Hexadecimal: 0x58E0BF15
• Base-36: ONRYMT

Squares and roots of 1491123989

• 1491123989 squared (1491123989²) is 2223450750571272121
• 1491123989 cubed (1491123989³) is 3315440752536879313870010669
• The square root of 1491123989 is 38615.0746341373
• The cube root of 1491123989 is 1142.4518862437

Scales and comparisons

• 1,491,123,989 seconds is equal to 47 years, 21 weeks, 3 days, 9 hours, 6 minutes, 29 seconds.
• To count from 1 to 1,491,123,989 would take you about ninety-four 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 1491123989 cubic inches would be around 95.2 feet tall.

Recreational maths with 1491123989

• 1491123989 backwards is 9893211941
• The number of decimal digits it has is: 10
• The sum of 1491123989's digits is 47
• More coming soon!