18071438

Names of 18071438

• Cardinal: 18071438 can be written as Eighteen million, seventy-one thousand, four hundred thirty-eight.

Scientific notation

• Scientific notation: 1.8071438 × 10⁷

Factors of 18071438

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 2792

Divisors of 18071438

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 7 11 14 22 43 77 86 154 301 473 602 946 2729 3311 5458 6622 19103 30019 38206 60038 117347 210133 234694 420266 821429 1290817 1642858 2581634 9035719 18071438
• Sum of all divisors σ(n): 34594560
• Sum of proper divisors (its aliquot sum) s(n): 16523122
• 18071438 is a deficient number, because the sum of its proper divisors (16523122) is less than itself. Its deficiency is 1548316

Bases of 18071438

• Binary: 1000100111011111110001110₂
• Hexadecimal: 0x113BF8E
• Base-36: ARC0E

Squares and roots of 18071438

• 18071438 squared (18071438²) is 326576871387844
• 18071438 cubed (18071438³) is 5901713683519396799672
• The square root of 18071438 is 4251.0513993601
• The cube root of 18071438 is 262.4203864385

Scales and comparisons

• 18,071,438 seconds is equal to 29 weeks, 6 days, 3 hours, 50 minutes, 38 seconds.
• To count from 1 to 18,071,438 would take you about forty-four 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 18071438 cubic inches would be around 21.9 feet tall.

Recreational maths with 18071438

• 18071438 backwards is 83417081
• The number of decimal digits it has is: 8
• The sum of 18071438's digits is 32
• More coming soon!