324
The Eiffel Tower is about 324 metres tall including its antennas.
Where 324 fits
Why 324 is special
It grows by several centimetres in summer as the iron expands, and it was the world's tallest structure for 41 years. Two hundred and fifty scientists and artists signed a petition against building it.
324 is part of
Factors & digit properties
- Divisors (15)
- 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 324
- Prime factorisation
- 2^2 × 3^4
- Digit sum
- 9
- Digital root
- 9
Representations
- Decimal
- 324
- Binary
- 101000100
- Octal
- 504
- Hexadecimal
- 144
- Roman numeral
- CCCXXIV
- Scientific notation
- 3.240 × 10^2
Other mathematical patterns
- Abundant number
- Powerful number
- Harshad (Niven) number
Related numbers & connections
The Gateway Arch stands in pure compression as an inverted catenary; the Eiffel Tower is a lattice carrying load in tension and compression together. Two different answers to holding up a tall structure.
View 630 →Technology & computing
The Eiffel Tower's iron expands in heat, so it is measurably taller in summer than winter. Its height including antennas is about 324 m, and it held the tallest-structure record from 1889 to 1930.
DocumentedTechnology & computingGeography: Paris, FrancePeriod: 1889
Common questions
Is 324 a prime number?
No, 324 is not prime.
What are the factors of 324?
The factors of 324 are 1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 81, 108, 162, 324.
What is 324 in Roman numerals?
324 in Roman numerals is CCCXXIV.
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