215399730

Names of 215399730

• Cardinal: 215399730 can be written as Two hundred fifteen million, three hundred ninety-nine thousand, seven hundred thirty.

Scientific notation

• Scientific notation: 2.1539973 × 10⁸

Factors of 215399730

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 78931

Divisors of 215399730

• Number of divisors d(n): 64
• Complete list of divisors:
  1 2 3 5 6 7 10 13 14 15 21 26 30 35 39 42 65 70 78 91 105 130 182 195 210 273 390 455 546 910 1365 2730 78901 157802 236703 394505 473406 552307 789010 1025713 1104614 1183515 1656921 2051426 2367030 2761535 3077139 3313842 5128565 5523070 6154278 7179991 8284605 10257130 14359982 15385695 16569210 21539973 30771390 35899955 43079946 71799910 107699865 215399730
• Sum of all divisors σ(n): 636265728
• Sum of proper divisors (its aliquot sum) s(n): 420865998
• 215399730 is an abundant number, because the sum of its proper divisors (420865998) is greater than itself. Its abundance is 205466268

Bases of 215399730

• Binary: 1100110101101011110100110010₂
• Hexadecimal: 0xCD6BD32
• Base-36: 3K8RHU

Squares and roots of 215399730

• 215399730 squared (215399730²) is 46397043684072900
• 215399730 cubed (215399730³) is 9993910682347507960317000
• The square root of 215399730 is 14676.5026487921
• The cube root of 215399730 is 599.4436787817

Scales and comparisons

• 215,399,730 seconds is equal to 6 years, 44 weeks, 1 day, 1 hour, 15 minutes, 30 seconds.
• To count from 1 to 215,399,730 would take you about ten 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 215399730 cubic inches would be around 50 feet tall.

Recreational maths with 215399730

• 215399730 backwards is 037993512
• 215399730 is a Harshad number.
• The number of decimal digits it has is: 9
• The sum of 215399730's digits is 39
• More coming soon!