28012840

Names of 28012840

• Cardinal: 28012840 can be written as Twenty-eight million, twelve thousand, eight hundred forty.

Scientific notation

• Scientific notation: 2.801284 × 10⁷

Factors of 28012840

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 8
• Sum of prime factors: 127

Divisors of 28012840

• Number of divisors d(n): 128
• Complete list of divisors:
  1 2 4 5 8 10 19 20 29 31 38 40 41 58 62 76 82 95 116 124 145 152 155 164 190 205 232 248 290 310 328 380 410 551 580 589 620 760 779 820 899 1102 1160 1178 1189 1240 1271 1558 1640 1798 2204 2356 2378 2542 2755 2945 3116 3596 3895 4408 4495 4712 4756 5084 5510 5890 5945 6232 6355 7192 7790 8990 9512 10168 11020 11780 11890 12710 15580 17081 17980 22040 22591 23560 23780 24149 25420 31160 34162 35960 36859 45182 47560 48298 50840 68324 73718 85405 90364 96596 112955 120745 136648 147436 170810 180728 184295 193192 225910 241490 294872 341620 368590 451820 482980 683240 700321 737180 903640 965960 1400642 1474360 2801284 3501605 5602568 7003210 14006420 28012840
• Sum of all divisors σ(n): 72576000
• Sum of proper divisors (its aliquot sum) s(n): 44563160
• 28012840 is an abundant number, because the sum of its proper divisors (44563160) is greater than itself. Its abundance is 16550320

Bases of 28012840

• Binary: 1101010110111000100101000₂
• Hexadecimal: 0x1AB7128
• Base-36: GOEUG

Squares and roots of 28012840

• 28012840 squared (28012840²) is 784719204865600
• 28012840 cubed (28012840³) is 21982213530827274304000
• The square root of 28012840 is 5292.7157490271
• The cube root of 28012840 is 303.7053065257

Scales and comparisons

• 28,012,840 seconds is equal to 46 weeks, 2 days, 5 hours, 20 minutes, 40 seconds.
• To count from 1 to 28,012,840 would take you about seventeen 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 28012840 cubic inches would be around 25.3 feet tall.

Recreational maths with 28012840

• 28012840 backwards is 04821082
• The number of decimal digits it has is: 8
• The sum of 28012840's digits is 25
• More coming soon!