3988921

Names of 3988921

• Cardinal: 3988921 can be written as Three million, nine hundred eighty-eight thousand, nine hundred twenty-one.

Scientific notation

• Scientific notation: 3.988921 × 10⁶

Factors of 3988921

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 815

Divisors of 3988921

• Number of divisors d(n): 8
• Complete list of divisors:
  1 29 263 523 7627 15167 137549 3988921
• Sum of all divisors σ(n): 4150080
• Sum of proper divisors (its aliquot sum) s(n): 161159
• 3988921 is a deficient number, because the sum of its proper divisors (161159) is less than itself. Its deficiency is 3827762

Bases of 3988921

• Binary: 1111001101110110111001₂
• Hexadecimal: 0x3CDDB9
• Base-36: 2DHVD

Squares and roots of 3988921

• 3988921 squared (3988921²) is 15911490744241
• 3988921 cubed (3988921³) is 63469679571008553961
• The square root of 3988921 is 1997.2283294607
• The cube root of 3988921 is 158.5934128775

Scales and comparisons

• 3,988,921 seconds is equal to 6 weeks, 4 days, 4 hours, 2 minutes, 1 second.
• To count from 1 to 3,988,921 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 3988921 cubic inches would be around 13.2 feet tall.

Recreational maths with 3988921

• 3988921 backwards is 1298893
• The number of decimal digits it has is: 7
• The sum of 3988921's digits is 40
• More coming soon!