3638

3638 is a natural number that comes after 3637 and before 3639. In mathematics, it is an even composite number.

Its prime factorization is 2 × 17 × 107, making it squarefree with three distinct prime factors. Consequently, 3638 has eight positive divisors: 1, 2, 17, 34, 107, 214, 1819, and 3638. The totient function yields φ(3638) = 1696, and the sum of its divisors is σ(3638) = 5832.

In various numeral systems, 3638 is represented as 111000110110 in binary and as 0xE36 in hexadecimal. In Roman numerals, it is written as MMMDCXXXVIII.

Additional notes: 3638 is congruent to 2 modulo 9, since the sum of its digits is 20. Like many four-digit numbers, 3638 may appear as an identifier, catalog number, or model designation in different contexts, but there is no widely cited mathematical constant or famous theorem uniquely associated with this specific number.