21988007

Names of 21988007

• Cardinal: 21988007 can be written as Twenty-one million, nine hundred eighty-eight thousand and seven.

Scientific notation

• Scientific notation: 2.1988007 × 10⁷

Factors of 21988007

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 3457

Divisors of 21988007

• Number of divisors d(n): 8
• Complete list of divisors:
  1 43 157 3257 6751 140051 511349 21988007
• Sum of all divisors σ(n): 22649616
• Sum of proper divisors (its aliquot sum) s(n): 661609
• 21988007 is a deficient number, because the sum of its proper divisors (661609) is less than itself. Its deficiency is 21326398

Bases of 21988007

• Binary: 1010011111000001010100111₂
• Hexadecimal: 0x14F82A7
• Base-36: D3A1Z

Squares and roots of 21988007

• 21988007 squared (21988007²) is 483472451832049
• 21988007 cubed (21988007³) is 10630595655190256236343
• The square root of 21988007 is 4689.1371274467
• The cube root of 21988007 is 280.1530073595

Scales and comparisons

• 21,988,007 seconds is equal to 36 weeks, 2 days, 11 hours, 46 minutes, 47 seconds.
• To count from 1 to 21,988,007 would take you about 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 21988007 cubic inches would be around 23.3 feet tall.

Recreational maths with 21988007

• 21988007 backwards is 70088912
• The number of decimal digits it has is: 8
• The sum of 21988007's digits is 35
• More coming soon!