138395604 has 12 divisors (see below), whose sum is σ = 322923104. Its totient is φ = 46131864.

The previous prime is 138395603. The next prime is 138395633. The reversal of 138395604 is 406593831.

It is a tau number, because it is divible by the number of its divisors (12).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138395603) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5766472 + ... + 5766495.

Almost surely, 2^138395604 is an apocalyptic number.

It is an amenable number.

138395604 is an abundant number, since it is smaller than the sum of its proper divisors (184527500).

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

138395604 is a wasteful number, since it uses less digits than its factorization.

138395604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11532974 (or 11532972 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 138395604 is about 11764.1660987934. The cubic root of 138395604 is about 517.2582567140.

The spelling of 138395604 in words is "one hundred thirty-eight million, three hundred ninety-five thousand, six hundred four".