28939428

Names of 28939428

• Cardinal: 28939428 can be written as Twenty-eight million, nine hundred thirty-nine thousand, four hundred twenty-eight.

Scientific notation

• Scientific notation: 2.8939428 × 10⁷

Factors of 28939428

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 5028

Divisors of 28939428

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 6 7 9 12 14 18 21 23 28 36 42 46 63 69 84 92 126 138 161 207 252 276 322 414 483 644 828 966 1449 1932 2898 4993 5796 9986 14979 19972 29958 34951 44937 59916 69902 89874 104853 114839 139804 179748 209706 229678 314559 344517 419412 459356 629118 689034 803873 1033551 1258236 1378068 1607746 2067102 2411619 3215492 4134204 4823238 7234857 9646476 14469714 28939428
• Sum of all divisors σ(n): 87255168
• Sum of proper divisors (its aliquot sum) s(n): 58315740
• 28939428 is an abundant number, because the sum of its proper divisors (58315740) is greater than itself. Its abundance is 29376312

Bases of 28939428

• Binary: 1101110011001010010100100₂
• Hexadecimal: 0x1B994A4
• Base-36: H89T0

Squares and roots of 28939428

• 28939428 squared (28939428²) is 837490492967184
• 28939428 cubed (28939428³) is 24236495821908327730752
• The square root of 28939428 is 5379.5378983701
• The cube root of 28939428 is 307.0176295903

Scales and comparisons

• 28,939,428 seconds is equal to 47 weeks, 5 days, 22 hours, 43 minutes, 48 seconds.
• To count from 1 to 28,939,428 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 28939428 cubic inches would be around 25.6 feet tall.

Recreational maths with 28939428

• 28939428 backwards is 82493982
• The number of decimal digits it has is: 8
• The sum of 28939428's digits is 45
• More coming soon!