138304168 has 32 divisors (see below), whose sum is σ = 266270400. Its totient is φ = 67310208.

The previous prime is 138304151. The next prime is 138304169. The reversal of 138304168 is 861403831.

It is not an unprimeable number, because it can be changed into a prime (138304169) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 140205 + ... + 141187.

It is an arithmetic number, because the mean of its divisors is an integer number (8320950).

Almost surely, 2^138304168 is an apocalyptic number.

It is an amenable number.

138304168 is a deficient number, since it is larger than the sum of its proper divisors (127966232).

138304168 is a wasteful number, since it uses less digits than its factorization.

138304168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1441 (or 1437 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 138304168 is about 11760.2792483852. The cubic root of 138304168 is about 517.1443165686.

Adding to 138304168 its reverse (861403831), we get a palindrome (999707999).

The spelling of 138304168 in words is "one hundred thirty-eight million, three hundred four thousand, one hundred sixty-eight".