42780

42780 is an integer number. It follows 42779 and precedes 42781. In mathematics, it is an even number, as it is divisible by 2. Its prime factorization is 2^2 * 3 * 3565. As an even number, it is also a composite number. The sum of its digits is 4 + 2 + 7 + 8 + 0 = 21.

In the context of the Dewey Decimal Classification system, 42780 does not represent a specific Dewey number. The Dewey Decimal Classification is a library cataloging system, and numbers in the 400s are generally dedicated to languages. For example, the 400s cover language in general, and specific numbers within this range denote particular languages and their linguistics. 42780 would fall outside of the standard numbering for English language literature, which typically resides in the 420-429 range.

The number 42780 has no widely recognized scientific, historical, or cultural significance. It is not a known constant, a significant date, or a commonly referenced quantity in popular culture. Its existence is primarily as a numerical value within the sequence of integers.