652

652 is an integer that follows 651 and precedes 653. In mathematics, it is an even composite number with prime factorization 2^2 × 163. Its positive divisors are 1, 2, 4, 163, 326, and 652. The sum of all divisors is 1148, and the sum of its proper divisors is 496, which is a perfect number; thus 652 is a deficient number. The Euler totient function value is φ(652) = 324. It is congruent to 0 modulo 4 and modulo 163, reflecting its factorization. In various numeral systems, 652 is written as 1010001100 in binary and 0x28C in hexadecimal, and in Roman numerals it is DCLII.

In calendar terms, 652 can denote a year in the 7th century. As with many years of that era, historical records vary by region, and the specific events associated with 652 CE differ across civilizations. The designation 652 is used primarily in mathematical, numerical, and chronological contexts, without implying a single global event.

See also: integer sequences containing 652, Roman numerals, and representations of decimal numbers in other bases.