72139215

Names of 72139215

• Cardinal: 72139215 can be written as Seventy-two million, one hundred thirty-nine thousand, two hundred fifteen.

Scientific notation

• Scientific notation: 7.2139215 × 10⁷

Factors of 72139215

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 4809289

Divisors of 72139215

• Number of divisors d(n): 8
• Complete list of divisors:
  1 3 5 15 4809281 14427843 24046405 72139215
• Sum of all divisors σ(n): 115422768
• Sum of proper divisors (its aliquot sum) s(n): 43283553
• 72139215 is a deficient number, because the sum of its proper divisors (43283553) is less than itself. Its deficiency is 28855662

Bases of 72139215

• Binary: 100010011001100000111001111₂
• Hexadecimal: 0x44CC1CF
• Base-36: 16Y6Z3

Squares and roots of 72139215

• 72139215 squared (72139215²) is 5204066340816225
• 72139215 cubed (72139215³) is 375417260634404930763375
• The square root of 72139215 is 8493.4807352461
• The cube root of 72139215 is 416.2847205661

Scales and comparisons

• 72,139,215 seconds is equal to 2 years, 15 weeks, 1 day, 22 hours, 40 minutes, 15 seconds.
• To count from 1 to 72,139,215 would take you about three 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 72139215 cubic inches would be around 34.7 feet tall.

Recreational maths with 72139215

• 72139215 backwards is 51293127
• The number of decimal digits it has is: 8
• The sum of 72139215's digits is 30
• More coming soon!