598

598 is a natural number that follows 597 and precedes 599. It is an even composite number with prime factorization 2 × 13 × 23.

Its positive divisors are 1, 2, 13, 23, 26, 46, 299, and 598. The sum of proper divisors is 410, which means 598 is a deficient number (the sum of its proper divisors is less than the number itself). Because one prime factor, 23, is congruent to 3 modulo 4 and appears to the first power, 598 cannot be expressed as a sum of two squares.

In various numeral systems, 598 has these representations: in base 2 it is 1001010110_2; in hexadecimal it is 0x256; in Roman numerals it is written as DXCVIII. In base 11, 598 equals 4A4_11.

As a calendar year, 598 CE is a year in the 6th century. Historical records from that period are sparse and vary by region, reflecting the broader context of late classical and early medieval era civilizations.