258

Names of 258

• Cardinal: 258 can be written as Two hundred fifty-eight.

Scientific notation

• Scientific notation: 2.58 × 10²

Factors of 258

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 48

Divisors of 258

• Number of divisors d(n): 8
• Complete list of divisors:
  1 2 3 6 43 86 129 258
• Sum of all divisors σ(n): 528
• Sum of proper divisors (its aliquot sum) s(n): 270
• 258 is an abundant number, because the sum of its proper divisors (270) is greater than itself. Its abundance is 12

Bases of 258

• Binary: 100000010₂
• Hexadecimal: 0x102
• Base-36: 76

Squares and roots of 258

• 258 squared (258²) is 66564
• 258 cubed (258³) is 17173512
• The square root of 258 is 16.0623784043
• The cube root of 258 is 6.3660967605

Scales and comparisons

• 258 seconds is equal to 4 minutes, 18 seconds.
• To count from 1 to 258 would take you about two 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 258 cubic inches would be around 0.5 feet tall.

Recreational maths with 258

• 258 backwards is 852
• The number of decimal digits it has is: 3
• The sum of 258's digits is 15
• More coming soon!