138442904 has 32 divisors (see below), whose sum is σ = 265155120. Its totient is φ = 67748736.

The previous prime is 138442891. The next prime is 138442919. The reversal of 138442904 is 409244831.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91982 + ... + 93474.

Almost surely, 2^138442904 is an apocalyptic number.

It is an amenable number.

138442904 is a deficient number, since it is larger than the sum of its proper divisors (126712216).

138442904 is a wasteful number, since it uses less digits than its factorization.

138442904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1739 (or 1735 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 138442904 is about 11766.1762692899. The cubic root of 138442904 is about 517.3171784524.

The spelling of 138442904 in words is "one hundred thirty-eight million, four hundred forty-two thousand, nine hundred four".