30421991

Names of 30421991

• Cardinal: 30421991 can be written as Thirty million, four hundred twenty-one thousand, nine hundred ninety-one.

Scientific notation

• Scientific notation: 3.0421991 × 10⁷

Factors of 30421991

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 30421991

Divisors of 30421991

• Number of divisors d(n): 2
• Complete list of divisors:
  1 30421991
• Sum of all divisors σ(n): 30421992
• Sum of proper divisors (its aliquot sum) s(n): 1
• 30421991 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 30421990

Bases of 30421991

• Binary: 1110100000011001111100111₂
• Hexadecimal: 0x1D033E7
• Base-36: I41RB

Squares and roots of 30421991

• 30421991 squared (30421991²) is 925497536404081
• 30421991 cubed (30421991³) is 28155477723007124545271
• The square root of 30421991 is 5515.6133838405
• The cube root of 30421991 is 312.1733880377

Scales and comparisons

• 30,421,991 seconds is equal to 50 weeks, 2 days, 2 hours, 33 minutes, 11 seconds.
• To count from 1 to 30,421,991 would take you about twenty-three 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 30421991 cubic inches would be around 26 feet tall.

Recreational maths with 30421991

• 30421991 backwards is 19912403
• The number of decimal digits it has is: 8
• The sum of 30421991's digits is 29
• More coming soon!