2403

2403 is a natural number that follows 2402 and precedes 2404. In mathematics it is an odd composite number with prime factorization 3^3 × 89. Its positive divisors are 1, 3, 9, 27, 89, 267, 801, and 2403. In Roman numerals, 2403 is written as MMCDIII.

As a calendar year, 2403 CE would be a year in the 25th century of the Gregorian calendar. It is not a leap year, since 2403 is not divisible by 4, and it would have 365 days if used in the proleptic Gregorian framework. Because it is far in the future, no widely documented historical events are associated with this year in standard reference works.

In astronomy, the number 2403 can serve as a designation within the system used for cataloguing minor planets. The International Astronomical Union’s Minor Planet Center assigns sequential numbers to confirmed objects, so the number 2403 identifies a particular asteroid or similar body, which may also have a given name.

Beyond mathematics and calendar use, 2403 appears as a general identifier in cataloging, product codes, or other numbering schemes across various fields. Without specific context, it functions as a plain numerical label.