1638213121

Names of 1638213121

• Cardinal: 1638213121 can be written as One billion, six hundred thirty-eight million, two hundred thirteen thousand, one hundred twenty-one.

Scientific notation

• Scientific notation: 1.638213121 × 10⁹

Factors of 1638213121

• Number of distinct prime factors ω(n): 3
• Total number of prime factors Ω(n): 3
• Sum of prime factors: 172223

Divisors of 1638213121

• Number of divisors d(n): 8
• Complete list of divisors:
  1 89 107 9523 172027 15310403 18406889 1638213121
• Sum of all divisors σ(n): 1672112160
• Sum of proper divisors (its aliquot sum) s(n): 33899039
• 1638213121 is a deficient number, because the sum of its proper divisors (33899039) is less than itself. Its deficiency is 1604314082

Bases of 1638213121

• Binary: 1100001101001010010011000000001₂
• Hexadecimal: 0x61A52601
• Base-36: R3CLC1

Squares and roots of 1638213121

• 1638213121 squared (1638213121²) is 2683742229816560641
• 1638213121 cubed (1638213121³) is 4396541734267287065178370561
• The square root of 1638213121 is 40474.8455339857
• The cube root of 1638213121 is 1178.8452557173

Scales and comparisons

• 1,638,213,121 seconds is equal to 52 years, 4 weeks, 4 days, 19 hours, 12 minutes, 1 second.
• To count from 1 to 1,638,213,121 would take you about one hundred four 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 1638213121 cubic inches would be around 98.2 feet tall.

Recreational maths with 1638213121

• 1638213121 backwards is 1213128361
• The number of decimal digits it has is: 10
• The sum of 1638213121's digits is 28
• More coming soon!