40000

Names of 40000

• Cardinal: 40000 can be written as Forty thousand.

Scientific notation

• Scientific notation: 4 × 10⁴

Factors of 40000

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 10
• Sum of prime factors: 7

Divisors of 40000

• Number of divisors d(n): 35
• Complete list of divisors:
  1 2 4 5 8 10 16 20 25 32 40 50 64 80 100 125 160 200 250 320 400 500 625 800 1000 1250 1600 2000 2500 4000 5000 8000 10000 20000 40000
• Sum of all divisors σ(n): 99187
• Sum of proper divisors (its aliquot sum) s(n): 59187
• 40000 is an abundant number, because the sum of its proper divisors (59187) is greater than itself. Its abundance is 19187

Bases of 40000

• Binary: 1001110001000000₂
• Hexadecimal: 0x9C40
• Base-36: UV4

Squares and roots of 40000

• 40000 squared (40000²) is 1600000000
• 40000 cubed (40000³) is 64000000000000
• 40000 is a perfect square number. Its square root is 200
• The cube root of 40000 is 34.1995189335

Scales and comparisons

• 40,000 seconds is equal to 11 hours, 6 minutes, 40 seconds.
• To count from 1 to 40,000 would take you about eleven 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 40000 cubic inches would be around 2.8 feet tall.

Recreational maths with 40000

• 40000 backwards is 00004
• 40000 is a Harshad number.
• The number of decimal digits it has is: 5
• The sum of 40000's digits is 4
• More coming soon!