3997297821

Names of 3997297821

• Cardinal: 3997297821 can be written as Three billion, nine hundred ninety-seven million, two hundred ninety-seven thousand, eight hundred twenty-one.

Scientific notation

• Scientific notation: 3.997297821 × 10⁹

Factors of 3997297821

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 6
• Sum of prime factors: 538

Divisors of 3997297821

• Number of divisors d(n): 64
• Complete list of divisors:
  1 3 11 31 33 93 113 151 229 339 341 453 687 1023 1243 1661 2519 3503 3729 4681 4983 7099 7557 10509 14043 17063 21297 25877 34579 38533 51189 51491 77631 78089 103737 115599 154473 187693 234267 284647 380369 528953 563079 802187 853941 1071949 1141107 1586859 2406561 3215847 3907427 5818483 8824057 11722281 11791439 17455449 26472171 35374317 42981697 121130237 128945091 363390711 1332432607 3997297821
• Sum of all divisors σ(n): 6121635840
• Sum of proper divisors (its aliquot sum) s(n): 2124338019
• 3997297821 is a deficient number, because the sum of its proper divisors (2124338019) is less than itself. Its deficiency is 1872959802

Bases of 3997297821

• Binary: 11101110010000011110110010011101₂
• Hexadecimal: 0xEE41EC9D
• Base-36: 1U3VYQL

Squares and roots of 3997297821

• 3997297821 squared (3997297821²) is 15978389869771348041
• 3997297821 cubed (3997297821³) is 63870383009525483292521918661
• The square root of 3997297821 is 63224.1869935865
• The cube root of 3997297821 is 1587.0435179639

Scales and comparisons

• 3,997,297,821 seconds is equal to 127 years, 5 weeks, 2 days, 30 minutes, 21 seconds.
• To count from 1 to 3,997,297,821 would take you about two hundred fifty-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 3997297821 cubic inches would be around 132.3 feet tall.

Recreational maths with 3997297821

• 3997297821 backwards is 1287927993
• The number of decimal digits it has is: 10
• The sum of 3997297821's digits is 57
• More coming soon!