1389

Names of 1389

• Cardinal: 1389 can be written as One thousand, three hundred eighty-nine.

Scientific notation

• Scientific notation: 1.389 × 10³

Factors of 1389

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 466

Divisors of 1389

• Number of divisors d(n): 4
• Complete list of divisors:
  1 3 463 1389
• Sum of all divisors σ(n): 1856
• Sum of proper divisors (its aliquot sum) s(n): 467
• 1389 is a deficient number, because the sum of its proper divisors (467) is less than itself. Its deficiency is 922

Bases of 1389

• Binary: 10101101101₂
• Hexadecimal: 0x56D
• Base-36: 12L

Squares and roots of 1389

• 1389 squared (1389²) is 1929321
• 1389 cubed (1389³) is 2679826869
• The square root of 1389 is 37.2692903071
• The cube root of 1389 is 11.1575133525

Scales and comparisons

• 1,389 seconds is equal to 23 minutes, 9 seconds.
• To count from 1 to 1,389 would take you about twenty-three minutes.

  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 1389 cubic inches would be around 0.9 feet tall.

Recreational maths with 1389

• 1389 backwards is 9831
• The number of decimal digits it has is: 4
• The sum of 1389's digits is 21
• More coming soon!