Number reference
46 explained.
46: forty-six, composite; factors, prime factorization, roots, binary, hexadecimal, and digit properties.
Identity and representations
- Written form
- forty-six
- Classification
- composite
- Factors
- 1, 2, 23, 46
- Prime factorization
- 2 × 23
- Square root
- 6.78233
- Cube root
- 3.583048
- Binary
- 101110
- Octal
- 56
- Hexadecimal
- 2E
- Roman numeral
- XLVI
- Digit sum
- 10
- Digital root
- 1
What makes 46 notable
- Semiprime. 46 = 2 × 23, a product of exactly two primes. That gives it just four divisors, so it splits into equal groups in only two non-trivial ways.
46 in everyday use
A human cell carries 46 chromosomes, 23 from each parent, so 46 is the first number a genetics student learns. It is the atomic number of palladium, the metal in catalytic converters. In the United States the 46th president is Joe Biden. The 46 Peaks of the Adirondacks are the summits climbers must reach to become an "Adirondack 46er", a challenge dating from the 1920s.
Forty-six is 2 × 23 and a centered triangular number, following 1, 4, 10, 19, and 31. It is the largest even number that cannot be written as the sum of two abundant numbers: every even number from 48 upward can be. In binary it is 101110, and it has just four divisors: 1, 2, 23, and 46.
Nearby numbers
How to read this page
The factor list shows every way 46 splits into equal whole-number groups — 4 divisors in total. The prime factorisation is the compact form of that same information, and the base conversions restate 46 for contexts that do not use decimal.
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