642221970

Names of 642221970

• Cardinal: 642221970 can be written as Six hundred forty-two million, two hundred twenty-one thousand, nine hundred seventy.

Scientific notation

• Scientific notation: 6.4222197 × 10⁸

Factors of 642221970

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 863

Divisors of 642221970

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 5 6 10 13 15 26 30 39 65 78 130 169 195 197 338 390 394 507 591 643 845 985 1014 1182 1286 1690 1929 1970 2535 2561 2955 3215 3858 5070 5122 5910 6430 7683 8359 9645 12805 15366 16718 19290 25077 25610 33293 38415 41795 50154 66586 76830 83590 99879 108667 125385 126671 166465 199758 217334 250770 253342 326001 332930 380013 499395 543335 633355 652002 760026 998790 1086670 1266710 1630005 1646723 1900065 3260010 3293446 3800130 4940169 8233615 9880338 16467230 21407399 24700845 42814798 49401690 64222197 107036995 128444394 214073990 321110985 642221970
• Sum of all divisors σ(n): 1680098112
• Sum of proper divisors (its aliquot sum) s(n): 1037876142
• 642221970 is an abundant number, because the sum of its proper divisors (1037876142) is greater than itself. Its abundance is 395654172

Bases of 642221970

• Binary: 100110010001111000011110010010₂
• Hexadecimal: 0x26478792
• Base-36: AMD1N6

Squares and roots of 642221970

• 642221970 squared (642221970²) is 412449058750680900
• 642221970 cubed (642221970³) is 264883847035508026439373000
• The square root of 642221970 is 25342.0987686497
• The cube root of 642221970 is 862.7700343305

Scales and comparisons

• 642,221,970 seconds is equal to 20 years, 21 weeks, 6 days, 2 hours, 59 minutes, 30 seconds.
• To count from 1 to 642,221,970 would take you about thirty 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 642221970 cubic inches would be around 71.9 feet tall.

Recreational maths with 642221970

• 642221970 backwards is 079122246
• The number of decimal digits it has is: 9
• The sum of 642221970's digits is 33
• More coming soon!