Number reference
76 explained.
76: seventy-six, composite; factors, prime factorization, roots, binary, hexadecimal, and digit properties.
Identity and representations
- Written form
- seventy-six
- Classification
- composite
- Factors
- 1, 2, 4, 19, 38, 76
- Prime factorization
- 2 × 2 × 19
- Square root
- 8.717798
- Cube root
- 4.235824
- Binary
- 1001100
- Octal
- 114
- Hexadecimal
- 4C
- Roman numeral
- LXXVI
- Digit sum
- 13
- Digital root
- 4
What makes 76 notable
- Factor structure. 76 breaks down into 2 distinct primes (2, 19) and has 6 divisors in total, so it can be split into equal whole-number groups 4 ways beyond 1 and itself.
76 in everyday use
Seventy-six is the atomic number of osmium, the densest naturally occurring element, used in fountain-pen nibs and electrical contacts. The "Spirit of '76" recalls the American Declaration of Independence in 1776, and the musical The Music Man marches "Seventy-Six Trombones" down the street. Halley's Comet returns roughly every 76 years; it was last seen in 1986 and is due again in 2061.
Seventy-six is 4 × 19 and an automorphic number: its square, 5,776, ends in 76, and so does every higher power of it. It is a Lucas number, the sum of 29 and 47 in the sequence that begins 2, 1, 3, 4, 7, 11. It has six divisors, and in binary it is 1001100. Its digits 7 and 6 sum to 13.
Nearby numbers
How to read this page
The factor list shows every way 76 splits into equal whole-number groups — 6 divisors in total. The prime factorisation is the compact form of that same information, and the base conversions restate 76 for contexts that do not use decimal.
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