568

568 is a natural number that comes after 567 and before 569. It is even and composite. Its prime factorization is 2^3 × 71, so its divisors are 1, 2, 4, 8, 71, 142, 284, and 568.

In numerals, 568 is written as DLXVIII in Roman numerals; in decimal notation it is the standard form. In binary it is 1000111000, and in hexadecimal it is 0x238.

In the year 568 CE, the Lombards, led by King Alboin, crossed the Alps and invaded Italy, establishing the Kingdom of the Lombards in the northern part of the peninsula. The invasion marked a major political realignment in post-Roman western Europe.

568 nanometers is a wavelength in the visible spectrum; light at this wavelength lies in the yellow-green region. It corresponds to a frequency of about 5.28 × 10^14 hertz.