16981990

Names of 16981990

• Cardinal: 16981990 can be written as Sixteen million, nine hundred eighty-one thousand, nine hundred ninety.

Scientific notation

• Scientific notation: 1.698199 × 10⁷

Factors of 16981990

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 664

Divisors of 16981990

• Number of divisors d(n): 32
• Complete list of divisors:
  1 2 5 10 43 73 86 146 215 365 430 541 730 1082 2705 3139 5410 6278 15695 23263 31390 39493 46526 78986 116315 197465 232630 394930 1698199 3396398 8490995 16981990
• Sum of all divisors σ(n): 31765536
• Sum of proper divisors (its aliquot sum) s(n): 14783546
• 16981990 is a deficient number, because the sum of its proper divisors (14783546) is less than itself. Its deficiency is 2198444

Bases of 16981990

• Binary: 1000000110001111111100110₂
• Hexadecimal: 0x1031FE6
• Base-36: A3ZDY

Squares and roots of 16981990

• 16981990 squared (16981990²) is 288387984360100
• 16981990 cubed (16981990³) is 4897401866523374599000
• The square root of 16981990 is 4120.9210135601
• The cube root of 16981990 is 257.0373254491

Scales and comparisons

• 16,981,990 seconds is equal to 28 weeks, 13 hours, 13 minutes, 10 seconds.
• To count from 1 to 16,981,990 would take you about forty-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 16981990 cubic inches would be around 21.4 feet tall.

Recreational maths with 16981990

• 16981990 backwards is 09918961
• 16981990 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 16981990's digits is 43
• More coming soon!