28139748

Names of 28139748

• Cardinal: 28139748 can be written as Twenty-eight million, one hundred thirty-nine thousand, seven hundred forty-eight.

Scientific notation

• Scientific notation: 2.8139748 × 10⁷

Factors of 28139748

• Number of distinct prime factors ω(n): 6
• Total number of prime factors Ω(n): 7
• Sum of prime factors: 451

Divisors of 28139748

• Number of divisors d(n): 96
• Complete list of divisors:
  1 2 3 4 6 7 12 13 14 21 26 28 39 42 52 73 78 84 91 146 156 182 219 273 292 353 364 438 511 546 706 876 949 1022 1059 1092 1412 1533 1898 2044 2118 2471 2847 3066 3796 4236 4589 4942 5694 6132 6643 7413 9178 9884 11388 13286 13767 14826 18356 19929 25769 26572 27534 29652 32123 39858 51538 55068 64246 77307 79716 96369 103076 128492 154614 180383 192738 309228 334997 360766 385476 541149 669994 721532 1004991 1082298 1339988 2009982 2164596 2344979 4019964 4689958 7034937 9379916 14069874 28139748
• Sum of all divisors σ(n): 82150656
• Sum of proper divisors (its aliquot sum) s(n): 54010908
• 28139748 is an abundant number, because the sum of its proper divisors (54010908) is greater than itself. Its abundance is 25871160

Bases of 28139748

• Binary: 1101011010110000011100100₂
• Hexadecimal: 0x1AD60E4
• Base-36: GR4RO

Squares and roots of 28139748

• 28139748 squared (28139748²) is 791845417503504
• 28139748 cubed (28139748³) is 22282330503503391676992
• The square root of 28139748 is 5304.6911314419
• The cube root of 28139748 is 304.1632462325

Scales and comparisons

• 28,139,748 seconds is equal to 46 weeks, 3 days, 16 hours, 35 minutes, 48 seconds.
• To count from 1 to 28,139,748 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 28139748 cubic inches would be around 25.3 feet tall.

Recreational maths with 28139748

• 28139748 backwards is 84793182
• 28139748 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 28139748's digits is 42
• More coming soon!