42870821

Names of 42870821

• Cardinal: 42870821 can be written as Forty-two million, eight hundred seventy thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 4.2870821 × 10⁷

Factors of 42870821

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 393

Divisors of 42870821

• Number of divisors d(n): 32
• Complete list of divisors:
  1 7 17 19 67 119 133 283 323 469 1139 1273 1981 2261 4811 5377 7973 8911 18961 21641 33677 37639 91409 132727 151487 322337 360259 639863 2256359 2521813 6124403 42870821
• Sum of all divisors σ(n): 55618560
• Sum of proper divisors (its aliquot sum) s(n): 12747739
• 42870821 is a deficient number, because the sum of its proper divisors (12747739) is less than itself. Its deficiency is 30123082

Bases of 42870821

• Binary: 10100011100010100000100101₂
• Hexadecimal: 0x28E2825
• Base-36: PIVC5

Squares and roots of 42870821

• 42870821 squared (42870821²) is 1837907293214041
• 42870821 cubed (42870821³) is 78792594581973666397661
• The square root of 42870821 is 6547.5813091553
• The cube root of 42870821 is 349.9886282019

Scales and comparisons

• 42,870,821 seconds is equal to 1 year, 18 weeks, 6 days, 4 hours, 33 minutes, 41 seconds.
• To count from 1 to 42,870,821 would take you about two 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 42870821 cubic inches would be around 29.2 feet tall.

Recreational maths with 42870821

• 42870821 backwards is 12807824
• The number of decimal digits it has is: 8
• The sum of 42870821's digits is 32
• More coming soon!