80000

80000, or eighty thousand, is a natural number that follows 79999 and precedes 80001. In decimal notation it is written as 8 followed by four zeros, and it equals 8 × 10^4. It lies between 70,000 and 90,000 and is a five-digit figure.

In prime factorization, 80000 = 2^7 × 5^4. Because of this factorization, the number is composite and has multiple divisors. It is divisible by 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 160, 200, 250, 320, 400, 500, 625, 800, 1000, 1250, 1600, 2000, 2500, 4000, 5000, 8000, 10000, 16000, 20000, 40000, and 80000, among others. The number of divisors is (7+1)(4+1) = 40. The sum of all divisors, σ(80000), equals 199,155, so the sum of proper divisors is 119,155, indicating the number is abundant.

80000 can be expressed in different numerical systems and notations. In scientific notation it is 8.0 × 10^4. In binary it is represented with a combination of bits corresponding to its powers of two, and in Roman numerals large values are typically written with vincula bars to indicate multiplication by 1,000; 80,000 would employ such notation. In everyday use, numbers of this magnitude commonly appear as population estimates, counts in statistics, or time-based quantities.

As a time reference, 80,000 hours is about 9.13 years.