30015138

Names of 30015138

• Cardinal: 30015138 can be written as Thirty million, fifteen thousand, one hundred thirty-eight.

Scientific notation

• Scientific notation: 3.0015138 × 10⁷

Factors of 30015138

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 1118

Divisors of 30015138

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 3 6 23 46 69 138 263 526 789 827 1578 1654 2481 4962 6049 12098 18147 19021 36294 38042 57063 114126 217501 435002 652503 1305006 5002523 10005046 15007569 30015138
• Sum of all divisors σ(n): 62954496
• Sum of proper divisors (its aliquot sum) s(n): 32939358
• 30015138 is an abundant number, because the sum of its proper divisors (32939358) is greater than itself. Its abundance is 2924220

Bases of 30015138

• Binary: 1110010011111111010100010₂
• Hexadecimal: 0x1C9FEA2
• Base-36: HVBTU

Squares and roots of 30015138

• 30015138 squared (30015138²) is 900908509159044
• 30015138 cubed (30015138³) is 27040893227782969608072
• The square root of 30015138 is 5478.6073047811
• The cube root of 30015138 is 310.7755054579

Scales and comparisons

• 30,015,138 seconds is equal to 49 weeks, 4 days, 9 hours, 32 minutes, 18 seconds.
• To count from 1 to 30,015,138 would take you about twenty-two weeks!

  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 30015138 cubic inches would be around 25.9 feet tall.

Recreational maths with 30015138

• 30015138 backwards is 83151003
• The number of decimal digits it has is: 8
• The sum of 30015138's digits is 21
• More coming soon!