365 (number)

← 364 365 366 →
List of numbers Integers ← 0 100 200 300 400 500 600 700 800 900 →
Cardinal	three hundred sixty-five
Ordinal	365th (three hundred sixty-fifth)
Factorization	5 × 73
Greek numeral	ΤΞΕ´
Roman numeral	CCCLXV, ccclxv
Binary	1011011012
Ternary	1111123
Senary	14056
Octal	5558
Duodecimal	26512
Hexadecimal	16D16

365 (three hundred [and] sixty-five) is the natural number following 364 and preceding 366.

Mathematics

365 is a semiprime centered square number. It is also the fifth 38-gonal number.

It is the smallest number that has more than one expression as a sum of consecutive square numbers:

$365=13^{2}+14^{2}$

$365=10^{2}+11^{2}+12^{2}$

Timekeeping

There are 365.2422 solar days in the mean tropical year. Several solar calendars have a year containing 365 days. Related to this, in Ontario, the driver's license learner's permit used to be called "365" because it was valid for only 366 days. Financial and scientific calculations often use a 365-day calendar to simplify daily rates.