138004644 has 24 divisors (see below), whose sum is σ = 322932960. Its totient is φ = 45869824.

The previous prime is 138004637. The next prime is 138004679. The reversal of 138004644 is 446400831.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12054 + ... + 20525.

It is an arithmetic number, because the mean of its divisors is an integer number (13455540).

Almost surely, 2^138004644 is an apocalyptic number.

It is an amenable number.

138004644 is an abundant number, since it is smaller than the sum of its proper divisors (184928316).

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

138004644 is a wasteful number, since it uses less digits than its factorization.

138004644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32939 (or 32937 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 138004644 is about 11747.5377845743. The cubic root of 138004644 is about 516.7707219257.

The spelling of 138004644 in words is "one hundred thirty-eight million, four thousand, six hundred forty-four".