38
38 is the atomic number of strontium, sitting directly between the perfect square 36 and the prime 37.
- Even
- Composite
Where 38 fits
Why 38 is special
38 is a quieter number mathematically (2 × 19) — its interest lies in its neighbours rather than a property of its own.
Factors & digit properties
- Divisors (4)
- 1, 2, 19, 38
- Prime factorisation
- 2 × 19
- Digit sum
- 11
- Digital root
- 2
Representations
- Decimal
- 38
- Binary
- 100110
- Octal
- 46
- Hexadecimal
- 26
- Roman numeral
- XXXVIII
- Scientific notation
- 3.800 × 10^1
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
Mathematical relationship19 is a factor of 38 (19 × 2 = 38).
38 has factor 1919 is a factor of 38 (19 × 2 = 38).
19 is a factor of 38 (19 × 2 = 38).
View 19 →How is 38 connected to another number? →
Science
38 is the atomic number of strontium.
DocumentedScience
Mathematics
38 sits directly between the perfect square 36 (6²) and the prime 37, and factors as 2 × 19.
DocumentedMathematics
Common questions
Is 38 a prime number?
No, 38 is not prime.
What are the factors of 38?
The factors of 38 are 1, 2, 19, 38.
What is 38 in Roman numerals?
38 in Roman numerals is XXXVIII.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 2 reviewer-confirmed records, sourced and reviewed before publication.
Last reviewed: 15 July 2026