3991989

Names of 3991989

• Cardinal: 3991989 can be written as Three million, nine hundred ninety-one thousand, nine hundred eighty-nine.

Scientific notation

• Scientific notation: 3.991989 × 10⁶

Factors of 3991989

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 5947

Divisors of 3991989

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 233 699 5711 17133 1330663 3991989
• Sum of all divisors σ(n): 5346432
• Sum of proper divisors (its aliquot sum) s(n): 1354443
• 3991989 is a deficient number, because the sum of its proper divisors (1354443) is less than itself. Its deficiency is 2637546

Bases of 3991989

• Binary: 1111001110100110110101₂
• Hexadecimal: 0x3CE9B5
• Base-36: 2DK8L

Squares and roots of 3991989

• 3991989 squared (3991989²) is 15935976176121
• 3991989 cubed (3991989³) is 63616241599337094669
• The square root of 3991989 is 1997.9962462429
• The cube root of 3991989 is 158.6340621241

Scales and comparisons

• 3,991,989 seconds is equal to 6 weeks, 4 days, 4 hours, 53 minutes, 9 seconds.
• To count from 1 to 3,991,989 would take you about nine 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 3991989 cubic inches would be around 13.2 feet tall.

Recreational maths with 3991989

• 3991989 backwards is 9891993
• The number of decimal digits it has is: 7
• The sum of 3991989's digits is 48
• More coming soon!