12990

Names of 12990

• Cardinal: 12990 can be written as Twelve thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 1.299 × 10⁴

Factors of 12990

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 4
• Sum of prime factors: 443

Divisors of 12990

• Number of divisors d(n): 16
• Complete list of divisors:
  1 2 3 5 6 10 15 30 433 866 1299 2165 2598 4330 6495 12990
• Sum of all divisors σ(n): 31248
• Sum of proper divisors (its aliquot sum) s(n): 18258
• 12990 is an abundant number, because the sum of its proper divisors (18258) is greater than itself. Its abundance is 5268

Bases of 12990

• Binary: 11001010111110₂
• Hexadecimal: 0x32BE
• Base-36: A0U

Squares and roots of 12990

• 12990 squared (12990²) is 168740100
• 12990 cubed (12990³) is 2191933899000
• The square root of 12990 is 113.9736811725
• The cube root of 12990 is 23.5073162673

Scales and comparisons

• 12,990 seconds is equal to 3 hours, 36 minutes, 30 seconds.
• To count from 1 to 12,990 would take you about three hours.

  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 12990 cubic inches would be around 2 feet tall.

Recreational maths with 12990

• 12990 backwards is 09921
• The number of decimal digits it has is: 5
• The sum of 12990's digits is 21
• More coming soon!