38139668 has 12 divisors (see below), whose sum is σ = 76279392. Its totient is φ = 16345560.

The previous prime is 38139649. The next prime is 38139677. The reversal of 38139668 is 86693183.

38139668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

38139668 is an admirable number.

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 in 3 ways as a sum of consecutive naturals, for example, 681038 + ... + 681093.

It is an arithmetic number, because the mean of its divisors is an integer number (6356616).

Almost surely, 2^38139668 is an apocalyptic number.

It is an amenable number.

38139668 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

38139668 is a wasteful number, since it uses less digits than its factorization.

38139668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362142 (or 1362140 counting only the distinct ones).

The product of its digits is 186624, while the sum is 44.

The square root of 38139668 is about 6175.7321833124. The cubic root of 38139668 is about 336.6089321425.

The spelling of 38139668 in words is "thirty-eight million, one hundred thirty-nine thousand, six hundred sixty-eight".