28400904

Names of 28400904

• Cardinal: 28400904 can be written as Twenty-eight million, four hundred thousand, nine hundred four.

Scientific notation

• Scientific notation: 2.8400904 × 10⁷

Factors of 28400904

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 1572

Divisors of 28400904

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 6 7 8 9 12 14 18 21 24 28 36 37 42 56 63 72 74 84 111 126 148 168 222 252 259 296 333 444 504 518 666 777 888 1036 1332 1523 1554 2072 2331 2664 3046 3108 4569 4662 6092 6216 9138 9324 10661 12184 13707 18276 18648 21322 27414 31983 36552 42644 54828 56351 63966 85288 95949 109656 112702 127932 169053 191898 225404 255864 338106 383796 394457 450808 507159 676212 767592 788914 1014318 1183371 1352424 1577828 2028636 2366742 3155656 3550113 4057272 4733484 7100226 9466968 14200452 28400904
• Sum of all divisors σ(n): 90342720
• Sum of proper divisors (its aliquot sum) s(n): 61941816
• 28400904 is an abundant number, because the sum of its proper divisors (61941816) is greater than itself. Its abundance is 33540912

Bases of 28400904

• Binary: 1101100010101110100001000₂
• Hexadecimal: 0x1B15D08
• Base-36: GWQA0

Squares and roots of 28400904

• 28400904 squared (28400904²) is 806611348017216
• 28400904 cubed (28400904³) is 22908491460347541963264
• The square root of 28400904 is 5329.2498534033
• The cube root of 28400904 is 305.1012975365

Scales and comparisons

• 28,400,904 seconds is equal to 46 weeks, 6 days, 17 hours, 8 minutes, 24 seconds.
• To count from 1 to 28,400,904 would take you about eighteen 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 28400904 cubic inches would be around 25.4 feet tall.

Recreational maths with 28400904

• 28400904 backwards is 40900482
• The number of decimal digits it has is: 8
• The sum of 28400904's digits is 27
• More coming soon!