58
58 is the atomic number of cerium, the most abundant rare-earth element.
- Even
- Composite
Where 58 fits
Why 58 is special
58's significance is an exact scientific identifier, not a mathematical property: cerium's fixed proton count. Despite belonging to the group popularly called "rare earths", cerium is actually the most abundant of them — more common in the Earth's crust than copper.
58 is part of
Factors & digit properties
- Divisors (4)
- 1, 2, 29, 58
- Prime factorisation
- 2 × 29
- Digit sum
- 13
- Digital root
- 4
Representations
- Decimal
- 58
- Binary
- 111010
- Octal
- 72
- Hexadecimal
- 3a
- Roman numeral
- LVIII
- Scientific notation
- 5.800 × 10^1
Other mathematical patterns
- Deficient number
- Semiprime
Related numbers & connections
29 is a factor of 58 (29 × 2 = 58).
View 29 →58 is the atomic number of cerium.
Mathematically related
- has factor29
why?
Strength 0.50, confidence "high".
Scientific association
- has scientific association withCerium (chemical element)
why?
Strength 0.50, confidence "high".
Science
58 is the atomic number of cerium, the most abundant of the rare-earth elements despite the name.
DocumentedScience58 is the atomic number of cerium, the most abundant of the rare-earth elements despite the name.
DocumentedScience
Common questions
Is 58 a prime number?
No, 58 is not prime.
What are the factors of 58?
The factors of 58 are 1, 2, 29, 58.
What is 58 in Roman numerals?
58 in Roman numerals is LVIII.
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