138669368 has 8 divisors (see below), whose sum is σ = 260005080. Its totient is φ = 69334680.

The previous prime is 138669337. The next prime is 138669371. The reversal of 138669368 is 863966831.

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

It is a congruent number.

It is an unprimeable number.

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, 8666828 + ... + 8666843.

It is an arithmetic number, because the mean of its divisors is an integer number (32500635).

Almost surely, 2^138669368 is an apocalyptic number.

It is an amenable number.

138669368 is a deficient number, since it is larger than the sum of its proper divisors (121335712).

138669368 is a wasteful number, since it uses less digits than its factorization.

138669368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17333677 (or 17333673 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 50.

The square root of 138669368 is about 11775.7958542088. The cubic root of 138669368 is about 517.5990994763.

The spelling of 138669368 in words is "one hundred thirty-eight million, six hundred sixty-nine thousand, three hundred sixty-eight".