138674328 has 32 divisors (see below), whose sum is σ = 373354800. Its totient is φ = 42668928.

The previous prime is 138674303. The next prime is 138674329. The reversal of 138674328 is 823476831.

138674328 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 138674328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (138674329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221923 + ... + 222546.

Almost surely, 2^138674328 is an apocalyptic number.

It is an amenable number.

138674328 is an abundant number, since it is smaller than the sum of its proper divisors (234680472).

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

138674328 is a wasteful number, since it uses less digits than its factorization.

138674328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444491 (or 444487 counting only the distinct ones).

The product of its digits is 193536, while the sum is 42.

The square root of 138674328 is about 11776.0064538026. The cubic root of 138674328 is about 517.6052706564.

The spelling of 138674328 in words is "one hundred thirty-eight million, six hundred seventy-four thousand, three hundred twenty-eight".