28981

Names of 28981

• Cardinal: 28981 can be written as Twenty-eight thousand, nine hundred eighty-one.

Scientific notation

• Scientific notation: 2.8981 × 10⁴

Factors of 28981

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 470

Divisors of 28981

• Number of divisors d(n): 4
• Complete list of divisors:
  1 73 397 28981
• Sum of all divisors σ(n): 29452
• Sum of proper divisors (its aliquot sum) s(n): 471
• 28981 is a deficient number, because the sum of its proper divisors (471) is less than itself. Its deficiency is 28510

Bases of 28981

• Binary: 111000100110101₂
• Hexadecimal: 0x7135
• Base-36: MD1

Squares and roots of 28981

• 28981 squared (28981²) is 839898361
• 28981 cubed (28981³) is 24341094400141
• The square root of 28981 is 170.2380685981
• The cube root of 28981 is 30.7164571335

Scales and comparisons

• 28,981 seconds is equal to 8 hours, 3 minutes, 1 second.
• To count from 1 to 28,981 would take you about eight 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 28981 cubic inches would be around 2.6 feet tall.

Recreational maths with 28981

• 28981 backwards is 18982
• The number of decimal digits it has is: 5
• The sum of 28981's digits is 28
• More coming soon!