18438091

Names of 18438091

• Cardinal: 18438091 can be written as Eighteen million, four hundred thirty-eight thousand and ninety-one.

Scientific notation

• Scientific notation: 1.8438091 × 10⁷

Factors of 18438091

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 2634020

Divisors of 18438091

• Number of divisors d(n): 4
• Complete list of divisors:
  1 7 2634013 18438091
• Sum of all divisors σ(n): 21072112
• Sum of proper divisors (its aliquot sum) s(n): 2634021
• 18438091 is a deficient number, because the sum of its proper divisors (2634021) is less than itself. Its deficiency is 15804070

Bases of 18438091

• Binary: 1000110010101011111001011₂
• Hexadecimal: 0x11957CB
• Base-36: AZ6X7

Squares and roots of 18438091

• 18438091 squared (18438091²) is 339963199724281
• 18438091 cubed (18438091³) is 6268272413167467987571
• The square root of 18438091 is 4293.9598274785
• The cube root of 18438091 is 264.1832739855

Scales and comparisons

• 18,438,091 seconds is equal to 30 weeks, 3 days, 9 hours, 41 minutes, 31 seconds.
• To count from 1 to 18,438,091 would take you about forty-five 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 18438091 cubic inches would be around 22 feet tall.

Recreational maths with 18438091

• 18438091 backwards is 19083481
• The number of decimal digits it has is: 8
• The sum of 18438091's digits is 34
• More coming soon!