138383768 has 8 divisors (see below), whose sum is σ = 259469580. Its totient is φ = 69191880.

The previous prime is 138383767. The next prime is 138383771. The reversal of 138383768 is 867383831.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138383767) 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 as a sum of consecutive naturals, namely, 8648978 + ... + 8648993.

Almost surely, 2^138383768 is an apocalyptic number.

It is an amenable number.

138383768 is a deficient number, since it is larger than the sum of its proper divisors (121085812).

138383768 is a wasteful number, since it uses less digits than its factorization.

138383768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17297977 (or 17297973 counting only the distinct ones).

The product of its digits is 580608, while the sum is 47.

The square root of 138383768 is about 11763.6630349564. The cubic root of 138383768 is about 517.2435104766.

The spelling of 138383768 in words is "one hundred thirty-eight million, three hundred eighty-three thousand, seven hundred sixty-eight".