401

Names of 401

• Cardinal: 401 can be written as Four hundred one.

Scientific notation

• Scientific notation: 4.01 × 10²

Factors of 401

• Number of distinct prime factors ω(n): 1
• Total number of prime factors Ω(n): 1
• Sum of prime factors: 401

Divisors of 401

• Number of divisors d(n): 2
• Complete list of divisors:
  1 401
• Sum of all divisors σ(n): 402
• Sum of proper divisors (its aliquot sum) s(n): 1
• 401 is a deficient number, because the sum of its proper divisors (1) is less than itself. Its deficiency is 400

Bases of 401

• Binary: 110010001₂
• Hexadecimal: 0x191
• Base-36: B5

Squares and roots of 401

• 401 squared (401²) is 160801
• 401 cubed (401³) is 64481201
• The square root of 401 is 20.0249843945
• The cube root of 401 is 7.3741979401

Scales and comparisons

• 401 seconds is equal to 6 minutes, 41 seconds.
• To count from 1 to 401 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 401 cubic inches would be around 0.6 feet tall.

Recreational maths with 401

• 401 backwards is 104
• The number of decimal digits it has is: 3
• The sum of 401's digits is 5
• More coming soon!