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80,000 (eighty thousand) is the natural number after 79,999 and before 80,001.

Selected numbers in the range 80,000–89,999

• 82,467 = number of square (0,1)-matrices without zero rows and with exactly 6 entries equal to 1^[1]
• 80,782 = Pell number P₁₄^[2]
• 82,000 = the only currently known number greater than 1 that can be written in bases from 2 through 5 using only 0s and 1s.^[3][4]
• 82,025 = number of primes .^[5]
• 82,656 = Kaprekar number: 82656² = 6832014336; 68320 + 14336 = 82656^[6]
• 82,944 = 3-smooth number: 2¹⁰ × 3⁴
• 83,097 = Riordan number
• 83,160 = highly composite number^[7]
• 83,357 = Friedman prime^[8]
• 83,521 = 17⁴
• 84,187 – number of parallelogram polyominoes with 15 cells.^[9]
• 85,085 = product of five consecutive primes: 5 × 7 × 11 × 13 × 17
• 85,184 = 44³
• 86,400 = seconds in a day: 24 × 60 × 60 and common DNS default time to live
• 87,360 = unitary perfect number^[10]
• 88,789 = the start of a prime 9-tuple, along with 88793, 88799, 88801, 88807, 88811, 88813, 88817, and 88819.
• 88,888 = repdigit

See also

• 80,000 Hours, a British career advisory service

References