640000

640000 is a natural number that follows 639999 and precedes 640001. In decimal notation it is written as six hundred forty thousand. It is an even, composite number with a prime factorization of 2^10 × 5^4, equivalently 64 × 10^4. This structure means its divisors are all numbers of the form 2^a × 5^b with 0 ≤ a ≤ 10 and 0 ≤ b ≤ 4. It can also be expressed in scientific notation as 6.4 × 10^5.

In other bases, 640000 has the hexadecimal representation 0x9C400, since 640000 decimal equals 9C400 in hex. The binary representation is 10011100010000000000₂ (derived from the hex form). These base representations reflect the same value in different numeral systems.

In digital storage contexts, 640,000 bytes equal 625 Kibibytes (KiB), since 1 KiB = 1024 bytes. This is exactly 640,000 / 1024 = 625 KiB. In mebibytes (MiB), that size is 640,000 / 1,048,576 = 0.6103515625 MiB. In decimal megabytes (MB), 640,000 bytes equal 0.64 MB.

Overall, 640000 is a round decimal value with a straightforward factorization, useful as a standard reference in mathematics and a common benchmark in data sizing and encoding discussions.

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