728423391

Names of 728423391

• Cardinal: 728423391 can be written as Seven hundred twenty-eight million, four hundred twenty-three thousand, three hundred ninety-one.

Scientific notation

• Scientific notation: 7.28423391 × 10⁸

Factors of 728423391

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 242807800

Divisors of 728423391

• Number of divisors d(n): 4
• Complete list of divisors:
  1 3 242807797 728423391
• Sum of all divisors σ(n): 971231192
• Sum of proper divisors (its aliquot sum) s(n): 242807801
• 728423391 is a deficient number, because the sum of its proper divisors (242807801) is less than itself. Its deficiency is 485615590

Bases of 728423391

• Binary: 101011011010101101101111011111₂
• Hexadecimal: 0x2B6ADBDF
• Base-36: C1ON33

Squares and roots of 728423391

• 728423391 squared (728423391²) is 530600636555938881
• 728423391 cubed (728423391³) is 386501914946835560886765471
• The square root of 728423391 is 26989.3199432665
• The cube root of 728423391 is 899.7626497565

Scales and comparisons

• 728,423,391 seconds is equal to 23 years, 8 weeks, 2 days, 19 hours, 49 minutes, 51 seconds.
• To count from 1 to 728,423,391 would take you about thirty-four years!

  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 728423391 cubic inches would be around 75 feet tall.

Recreational maths with 728423391

• 728423391 backwards is 193324827
• The number of decimal digits it has is: 9
• The sum of 728423391's digits is 39
• More coming soon!