Compare 28 vs 47

Typecomposite numberprime
Unique factors21
Total factors31
Prime factorization22 × 71471
Prime factorization2 × 2 × 747
Divisors count62
Divisors1, 2, 4, 7, 14, 281, 47
Number of properties021
Additive primes 10th
Carol primes 2nd
Chen primes 14th
Class 1+ primes 9th
Cousin primes (2nd member) 6th
Isolated primes 4th
Left-truncatable primes 10th
Long primes 6th
Lucas primes 6th
Pierpont primes of the 2nd kind 9th
Primes 15th
Prime triplets (3rd member) 7th
Safe primes 5th
Sexy primes (1st member) 10th
Sexy primes (2nd member) 9th
Sexy prime quadrupletss (2nd member) 3rd
Sexy prime triplets (1st member) 7th
Sexy prime triplets (2nd member) 6th
Solinas primes 13th
Thabit primes 5th
Ulam primes 5th
Roman numberalsXXVIIIXLVII
Base 21110021011112
Base 31001312023
Base 413042334
Base 510351425
Base 64461156
Base 7407657
Base 8348578
Base 9319529
Base 1028104710
Base 1126114311
Base 1224123b12
Base 1322133813
Base 1420143514
Base 151d153215
Base 161c162f16
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