728139157

Names of 728139157

• Cardinal: 728139157 can be written as Seven hundred twenty-eight million, one hundred thirty-nine thousand, one hundred fifty-seven.

Scientific notation

• Scientific notation: 7.28139157 × 10⁸

Factors of 728139157

• Number of distinct prime factors ω(n): 2
• Total number of prime factors Ω(n): 2
• Sum of prime factors: 9974582

Divisors of 728139157

• Number of divisors d(n): 4
• Complete list of divisors:
  1 73 9974509 728139157
• Sum of all divisors σ(n): 738113740
• Sum of proper divisors (its aliquot sum) s(n): 9974583
• 728139157 is a deficient number, because the sum of its proper divisors (9974583) is less than itself. Its deficiency is 718164574

Bases of 728139157

• Binary: 101011011001101000010110010101₂
• Hexadecimal: 0x2B668595
• Base-36: C1IJRP

Squares and roots of 728139157

• 728139157 squared (728139157²) is 530186631956670649
• 728139157 cubed (728139157³) is 386049647245599426889502893
• The square root of 728139157 is 26984.0537540229
• The cube root of 728139157 is 899.6456040881

Scales and comparisons

• 728,139,157 seconds is equal to 23 years, 7 weeks, 6 days, 12 hours, 52 minutes, 37 seconds.
• To count from 1 to 728,139,157 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 728139157 cubic inches would be around 75 feet tall.

Recreational maths with 728139157

• 728139157 backwards is 751931827
• The number of decimal digits it has is: 9
• The sum of 728139157's digits is 43
• More coming soon!