90000

90000 is a natural number that follows 89999 and precedes 90001. In decimal notation it is written as 90000, and it is equal to 9 × 10^4.

In mathematics, 90000 factors as 2^4 × 3^2 × 5^4. It is divisible by 9 and by 16 and 625, reflecting its composition as a multiple of 10,000. It is also a Harshad (Niven) number, since 9 is the sum of its digits and 90000 ÷ 9 = 10000.

Representations in other bases include binary 10101111110010000 and hexadecimal 0x15F90.

As a round number, 90000 appears in contexts such as budgeting, population estimates, and data sizes. For example, 90,000 bytes is about 87.9 KiB (approximately 90 KB in decimal terms).

The name derives from the English words ninety and thousand, together describing the value. In numerical and scientific writing, 90,000 is commonly used to express orders of magnitude or approximate counts when exact precision is not required.