138304 has 14 divisors (see below), whose sum is σ = 274574. Its totient is φ = 69120.
The previous prime is 138289. The next prime is 138311. The reversal of 138304 is 403831.
It can be written as a sum of positive squares in only one way, i.e., 123904 + 14400 = 352^2 + 120^2 .
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (5) of ones.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1017 + ... + 1144.
2138304 is an apocalyptic number.
It is an amenable number.
138304 is a deficient number, since it is larger than the sum of its proper divisors (136270).
138304 is an equidigital number, since it uses as much as digits as its factorization.
138304 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 2173 (or 2163 counting only the distinct ones).
The product of its (nonzero) digits is 288, while the sum is 19.
The square root of 138304 is about 371.8924575734. The cubic root of 138304 is about 51.7144107174.
The spelling of 138304 in words is "one hundred thirty-eight thousand, three hundred four".
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