138390604 has 72 divisors (see below), whose sum is σ = 284886000. Its totient is φ = 58608000.

The previous prime is 138390599. The next prime is 138390611. The reversal of 138390604 is 406093831.

138390604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (34) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 138390604.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 928722 + ... + 928870.

It is an arithmetic number, because the mean of its divisors is an integer number (3956750).

Almost surely, 2^138390604 is an apocalyptic number.

It is an amenable number.

138390604 is an abundant number, since it is smaller than the sum of its proper divisors (146495396).

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

138390604 is a wasteful number, since it uses less digits than its factorization.

138390604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295 (or 282 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 138390604 is about 11763.9535871237. The cubic root of 138390604 is about 517.2520274158.

The spelling of 138390604 in words is "one hundred thirty-eight million, three hundred ninety thousand, six hundred four".