138658504 has 16 divisors (see below), whose sum is σ = 273668400. Its totient is φ = 65680272.

The previous prime is 138658469. The next prime is 138658519. The reversal of 138658504 is 405856831.

138658504 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 455962 + ... + 456265.

It is an arithmetic number, because the mean of its divisors is an integer number (17104275).

Almost surely, 2^138658504 is an apocalyptic number.

It is an amenable number.

138658504 is a deficient number, since it is larger than the sum of its proper divisors (135009896).

138658504 is a wasteful number, since it uses less digits than its factorization.

138658504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 912252 (or 912248 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 40.

The square root of 138658504 is about 11775.3345600030. The cubic root of 138658504 is about 517.5855820871.

The spelling of 138658504 in words is "one hundred thirty-eight million, six hundred fifty-eight thousand, five hundred four".