642835140

Names of 642835140

• Cardinal: 642835140 can be written as Six hundred forty-two million, eight hundred thirty-five thousand, one hundred forty.

Scientific notation

• Scientific notation: 6.4283514 × 10⁸

Factors of 642835140

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 10713929

Divisors of 642835140

• Number of divisors d(n): 24
• Complete list of divisors:
  1 2 3 4 5 6 10 12 15 20 30 60 10713919 21427838 32141757 42855676 53569595 64283514 107139190 128567028 160708785 214278380 321417570 642835140
• Sum of all divisors σ(n): 1799938560
• Sum of proper divisors (its aliquot sum) s(n): 1157103420
• 642835140 is an abundant number, because the sum of its proper divisors (1157103420) is greater than itself. Its abundance is 514268280

Bases of 642835140

• Binary: 100110010100001110001011000100₂
• Hexadecimal: 0x2650E2C4
• Base-36: AMQ6RO

Squares and roots of 642835140

• 642835140 squared (642835140²) is 413237017218819600
• 642835140 cubed (642835140³) is 265643275817042308200744000
• The square root of 642835140 is 25354.1937359483
• The cube root of 642835140 is 863.0445273933

Scales and comparisons

• 642,835,140 seconds is equal to 20 years, 22 weeks, 6 days, 5 hours, 19 minutes.
• To count from 1 to 642,835,140 would take you about thirty 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 642835140 cubic inches would be around 71.9 feet tall.

Recreational maths with 642835140

• 642835140 backwards is 041538246
• The number of decimal digits it has is: 9
• The sum of 642835140's digits is 33
• More coming soon!