398

Names of 398

• Cardinal: 398 can be written as Three hundred ninety-eight.

Scientific notation

• Scientific notation: 3.98 × 10²

Factors of 398

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 201

Divisors of 398

• Number of divisors d(n): 4
• Complete list of divisors:
  1 2 199 398
• Sum of all divisors σ(n): 600
• Sum of proper divisors (its aliquot sum) s(n): 202
• 398 is a deficient number, because the sum of its proper divisors (202) is less than itself. Its deficiency is 196

Bases of 398

• Binary: 110001110₂
• Hexadecimal: 0x18E
• Base-36: B2

Squares and roots of 398

• 398 squared (398²) is 158404
• 398 cubed (398³) is 63044792
• The square root of 398 is 19.9499373431
• The cube root of 398 is 7.3557623685

Scales and comparisons

• 398 seconds is equal to 6 minutes, 38 seconds.
• To count from 1 to 398 would take you about 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 398 cubic inches would be around 0.6 feet tall.

Recreational maths with 398

• 398 backwards is 893
• The number of decimal digits it has is: 3
• The sum of 398's digits is 20
• More coming soon!