81230400

Names of 81230400

• Cardinal: 81230400 can be written as Eighty-one million, two hundred thirty thousand, four hundred.

Scientific notation

• Scientific notation: 8.12304 × 10⁷

Factors of 81230400

• Number of distinct prime factors ω(n): 4
• Total number of prime factors Ω(n): 11
• Sum of prime factors: 5651

Divisors of 81230400

• Number of divisors d(n): 126
• Complete list of divisors:
  1 2 3 4 5 6 8 9 10 12 15 16 18 20 24 25 30 32 36 40 45 48 50 60 64 72 75 80 90 96 100 120 144 150 160 180 192 200 225 240 288 300 320 360 400 450 480 576 600 720 800 900 960 1200 1440 1600 1800 2400 2880 3600 4800 5641 7200 11282 14400 16923 22564 28205 33846 45128 50769 56410 67692 84615 90256 101538 112820 135384 141025 169230 180512 203076 225640 253845 270768 282050 338460 361024 406152 423075 451280 507690 541536 564100 676920 812304 846150 902560 1015380 1083072 1128200 1269225 1353840 1624608 1692300 1805120 2030760 2256400 2538450 2707680 3249216 3384600 4061520 4512800 5076900 5415360 6769200 8123040 9025600 10153800 13538400 16246080 20307600 27076800 40615200 81230400
• Sum of all divisors σ(n): 288763202
• Sum of proper divisors (its aliquot sum) s(n): 207532802
• 81230400 is an abundant number, because the sum of its proper divisors (207532802) is greater than itself. Its abundance is 126302402

Bases of 81230400

• Binary: 100110101110111101001000000₂
• Hexadecimal: 0x4D77A40
• Base-36: 1CD1S0

Squares and roots of 81230400

• 81230400 squared (81230400²) is 6598377884160000
• 81230400 cubed (81230400³) is 535988874881470464000000
• The square root of 81230400 is 9012.7909107001
• The cube root of 81230400 is 433.0847226153

Scales and comparisons

• 81,230,400 seconds is equal to 2 years, 30 weeks, 2 days, 4 hours.
• To count from 1 to 81,230,400 would take you about three years!

  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 81230400 cubic inches would be around 36.1 feet tall.

Recreational maths with 81230400

• 81230400 backwards is 00403218
• 81230400 is a Harshad number.
• The number of decimal digits it has is: 8
• The sum of 81230400's digits is 18
• More coming soon!