13123440

Names of 13123440

• Cardinal: 13123440 can be written as Thirteen million, one hundred twenty-three thousand, four hundred forty.

Scientific notation

• Scientific notation: 1.312344 × 10⁷

Factors of 13123440

• Number of distinct prime factors ω(n): 5
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1678

Divisors of 13123440

• Number of divisors d(n): 120
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 11 12 15 16 18 20 22 24 30 33 36 40 44 45 48 55 60 66 72 80 88 90 99 110 120 132 144 165 176 180 198 220 240 264 330 360 396 440 495 528 660 720 792 880 990 1320 1584 1657 1980 2640 3314 3960 4971 6628 7920 8285 9942 13256 14913 16570 18227 19884 24855 26512 29826 33140 36454 39768 49710 54681 59652 66280 72908 74565 79536 91135 99420 109362 119304 132560 145816 149130 164043 182270 198840 218724 238608 273405 291632 298260 328086 364540 397680 437448 546810 596520 656172 729080 820215 874896 1093620 1193040 1312344 1458160 1640430 2187240 2624688 3280860 4374480 6561720 13123440
• Sum of all divisors σ(n): 48108528
• Sum of proper divisors (its aliquot sum) s(n): 34985088
• 13123440 is an abundant number, because the sum of its proper divisors (34985088) is greater than itself. Its abundance is 21861648

Bases of 13123440

• Binary: 110010000011111101110000₂
• Hexadecimal: 0xC83F70
• Base-36: 7TA40

Squares and roots of 13123440

• 13123440 squared (13123440²) is 172224677433600
• 13123440 cubed (13123440³) is 2260180220819203584000
• The square root of 13123440 is 3622.6288796949
• The cube root of 13123440 is 235.8753531185

Scales and comparisons

• 13,123,440 seconds is equal to 21 weeks, 4 days, 21 hours, 24 minutes.
• To count from 1 to 13,123,440 would take you about thirty-two 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 13123440 cubic inches would be around 19.7 feet tall.

Recreational maths with 13123440

• 13123440 backwards is 04432131
• 13123440 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 13123440's digits is 18
• More coming soon!