748

748 is a natural number that follows 747 and precedes 749. In mathematics, it is an even composite number. Its prime factorization is 2^2 × 11 × 17, and it has 12 positive divisors. The sum of all divisors of 748 is 1512, so the sum of proper divisors is 764; the number is not a perfect number.

In Roman numerals, 748 is written as DCCXLVIII. In common numeral systems, 748 corresponds to 1011101100 in binary, 1354 in octal, and 2EC in hexadecimal.

In science, a wavelength of 748 nanometers lies at the red end of the visible spectrum, near the boundary with infrared.

Historically, the year AD 748 marks events in various regions of the world, including early medieval Europe and East Asia, though significance depends on the historical source.

As a number, 748 is used in numbering systems, identifiers, and statistics, but it does not have a widely recognized universal meaning beyond its mathematical properties.