30389821

Names of 30389821

• Cardinal: 30389821 can be written as Thirty million, three hundred eighty-nine thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 3.0389821 × 10⁷

Factors of 30389821

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 394691

Divisors of 30389821

• Number of divisors d(n): 8
• Complete list of divisors:
  1 7 11 77 394673 2762711 4341403 30389821
• Sum of all divisors σ(n): 37888704
• Sum of proper divisors (its aliquot sum) s(n): 7498883
• 30389821 is a deficient number, because the sum of its proper divisors (7498883) is less than itself. Its deficiency is 22890938

Bases of 30389821

• Binary: 1110011111011011000111101₂
• Hexadecimal: 0x1CFB63D
• Base-36: I3CXP

Squares and roots of 30389821

• 30389821 squared (30389821²) is 923541220412041
• 30389821 cubed (30389821³) is 28066252374443472234661
• The square root of 30389821 is 5512.6963457097
• The cube root of 30389821 is 312.0633124035

Scales and comparisons

• 30,389,821 seconds is equal to 50 weeks, 1 day, 17 hours, 37 minutes, 1 second.
• To count from 1 to 30,389,821 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 30389821 cubic inches would be around 26 feet tall.

Recreational maths with 30389821

• 30389821 backwards is 12898303
• The number of decimal digits it has is: 8
• The sum of 30389821's digits is 34
• More coming soon!