378
+378 is the international calling code for San Marino.
- Even
- Composite
Where 378 fits
Why 378 is special
San Marino claims to be the oldest surviving sovereign state and republic, founded by tradition in 301 and entirely surrounded by Italy.
378 is part of
Factors & digit properties
- Divisors (16)
- 1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 189, 378
- Prime factorisation
- 2 × 3^3 × 7
- Digit sum
- 18
- Digital root
- 9
Representations
- Decimal
- 378
- Binary
- 101111010
- Octal
- 572
- Hexadecimal
- 17a
- Roman numeral
- CCCLXXVIII
- Scientific notation
- 3.780 × 10^2
Other mathematical patterns
- Triangular number
- Abundant number
- Hexagonal number
- Harshad (Niven) number
Related numbers & connections
San Marino and Vatican City are both entirely enclosed by Italy. San Marino is generally described as the oldest surviving republic and the Vatican as the smallest sovereign state.
View 379 →Other connections
- is associated with379
why?
Strength 0.50, confidence "high".
Geography
+378 reaches San Marino, which by tradition dates from 301 and is generally described as the oldest surviving republic. It is entirely enclosed by Italy.
DocumentedGeographyGeography: San Marino
Common questions
Is 378 a prime number?
No, 378 is not prime.
What are the factors of 378?
The factors of 378 are 1, 2, 3, 6, 7, 9, 14, 18, 21, 27, 42, 54, 63, 126, 189, 378.
What is 378 in Roman numerals?
378 in Roman numerals is CCCLXXVIII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026