138604828 has 6 divisors (see below), whose sum is σ = 242558456. Its totient is φ = 69302412.

The previous prime is 138604819. The next prime is 138604889. The reversal of 138604828 is 828406831.

138604828 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×138604828² = 38422596689819168, which contains 22 as substring.

138604828 is strictly pandigital in base 9.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 17325600 + ... + 17325607.

Almost surely, 2^138604828 is an apocalyptic number.

It is an amenable number.

138604828 is a deficient number, since it is larger than the sum of its proper divisors (103953628).

138604828 is a wasteful number, since it uses less digits than its factorization.

138604828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34651211 (or 34651209 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 40.

The square root of 138604828 is about 11773.0551684769. The cubic root of 138604828 is about 517.5187860653.

The spelling of 138604828 in words is "one hundred thirty-eight million, six hundred four thousand, eight hundred twenty-eight".