18999072

Names of 18999072

• Cardinal: 18999072 can be written as Eighteen million, nine hundred ninety-nine thousand and seventy-two.

Scientific notation

• Scientific notation: 1.8999072 × 10⁷

Factors of 18999072

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 9
• Sum of prime factors: 1655

Divisors of 18999072

• Number of divisors d(n): 72
• Complete list of divisors:
  1 2 3 4 6 8 9 12 16 18 24 32 36 41 48 72 82 96 123 144 164 246 288 328 369 492 656 738 984 1312 1476 1609 1968 2952 3218 3936 4827 5904 6436 9654 11808 12872 14481 19308 25744 28962 38616 51488 57924 65969 77232 115848 131938 154464 197907 231696 263876 395814 463392 527752 593721 791628 1055504 1187442 1583256 2111008 2374884 3166512 4749768 6333024 9499536 18999072
• Sum of all divisors σ(n): 55380780
• Sum of proper divisors (its aliquot sum) s(n): 36381708
• 18999072 is an abundant number, because the sum of its proper divisors (36381708) is greater than itself. Its abundance is 17382636

Bases of 18999072

• Binary: 1001000011110011100100000₂
• Hexadecimal: 0x121E720
• Base-36: BB7S0

Squares and roots of 18999072

• 18999072 squared (18999072²) is 360964736861184
• 18999072 cubed (18999072³) is 6857995025086688821248
• The square root of 18999072 is 4358.7924933403
• The cube root of 18999072 is 266.8358204563

Scales and comparisons

• 18,999,072 seconds is equal to 31 weeks, 2 days, 21 hours, 31 minutes, 12 seconds.
• To count from 1 to 18,999,072 would take you about forty-seven 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 18999072 cubic inches would be around 22.2 feet tall.

Recreational maths with 18999072

• 18999072 backwards is 27099981
• The number of decimal digits it has is: 8
• The sum of 18999072's digits is 45
• More coming soon!