745

Names of 745

• Cardinal: 745 can be written as Seven hundred forty-five.

Scientific notation

• Scientific notation: 7.45 × 10²

Factors of 745

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 154

Divisors of 745

• Number of divisors d(n): 4
• Complete list of divisors:
  1 5 149 745
• Sum of all divisors σ(n): 900
• Sum of proper divisors (its aliquot sum) s(n): 155
• 745 is a deficient number, because the sum of its proper divisors (155) is less than itself. Its deficiency is 590

Bases of 745

• Binary: 1011101001₂
• Hexadecimal: 0x2E9
• Base-36: KP

Squares and roots of 745

• 745 squared (745²) is 555025
• 745 cubed (745³) is 413493625
• The square root of 745 is 27.2946881277
• The cube root of 745 is 9.0653677013

Scales and comparisons

• 745 seconds is equal to 12 minutes, 25 seconds.
• To count from 1 to 745 would take you about six 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 745 cubic inches would be around 0.8 feet tall.

Recreational maths with 745

• 745 backwards is 547
• The number of decimal digits it has is: 3
• The sum of 745's digits is 16
• More coming soon!