036

036 is a three-digit numeral that, in ordinary decimal arithmetic, denotes the integer 36. The leading zero can be significant in certain contexts, such as computer programming, where a prefix 0 often indicates octal notation in languages with C-style syntax.

In mathematics, 36 is notable for several properties: it is a perfect square (6 squared) and a triangular number (the eighth triangular number, since 8 × 9 / 2 = 36). It has nine positive divisors (1, 2, 3, 4, 6, 9, 12, 18, 36) and is a highly composite number, meaning it has more divisors than any smaller positive integer. It is also a Harshad number in base 10, since 36 is divisible by the sum of its digits (3 + 6 = 9).

Representations in other bases include binary 100100, octal 44, and hexadecimal 24. In Roman numerals, 36 is XXXVI. In programming languages that interpret a leading zero as octal, the literal 036 denotes octal 36, which equals decimal 30; languages such as Python 3 require 0o36 for octal, while some older languages accept 036 as octal directly.

Uses of the sequence 036 can occur in data contexts as a numeric code, catalog number, or component of identifiers. As a year, 036 could refer to the year AD 036 in historical timelines or a shorthand reference in documentary contexts. Overall, 036 primarily functions as a numeric string with multiple mathematical and programming implications, depending on the notation and system in use.