28742007

Names of 28742007

• Cardinal: 28742007 can be written as Twenty-eight million, seven hundred forty-two thousand and seven.

Scientific notation

• Scientific notation: 2.8742007 × 10⁷

Factors of 28742007

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 5
• Sum of prime factors: 639

Divisors of 28742007

• Number of divisors d(n): 32
• Complete list of divisors:
  1 3 7 21 37 71 111 213 259 497 521 777 1491 1563 2627 3647 7881 10941 18389 19277 36991 55167 57831 110973 134939 258937 404817 776811 1368667 4106001 9580669 28742007
• Sum of all divisors σ(n): 45702144
• Sum of proper divisors (its aliquot sum) s(n): 16960137
• 28742007 is a deficient number, because the sum of its proper divisors (16960137) is less than itself. Its deficiency is 11781870

Bases of 28742007

• Binary: 1101101101001000101110111₂
• Hexadecimal: 0x1B69177
• Base-36: H41H3

Squares and roots of 28742007

• 28742007 squared (28742007²) is 826102966388049
• 28742007 cubed (28742007³) is 23743857242646069074343
• The square root of 28742007 is 5361.1572444763
• The cube root of 28742007 is 306.3178912651

Scales and comparisons

• 28,742,007 seconds is equal to 47 weeks, 3 days, 15 hours, 53 minutes, 27 seconds.
• To count from 1 to 28,742,007 would take you about nineteen 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 28742007 cubic inches would be around 25.5 feet tall.

Recreational maths with 28742007

• 28742007 backwards is 70024782
• The number of decimal digits it has is: 8
• The sum of 28742007's digits is 30
• More coming soon!