328000138 has 4 divisors (see below), whose sum is σ = 492000210. Its totient is φ = 164000068.

The previous prime is 328000129. The next prime is 328000163. The reversal of 328000138 is 831000823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 831000823 = 863 ⋅962921.

It can be written as a sum of positive squares in only one way, i.e., 197880489 + 130119649 = 14067^2 + 11407^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82000033 + ... + 82000036.

Almost surely, 2^328000138 is an apocalyptic number.

328000138 is a deficient number, since it is larger than the sum of its proper divisors (164000072).

328000138 is a wasteful number, since it uses less digits than its factorization.

328000138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164000071.

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 328000138 is about 18110.7740861621. The cubic root of 328000138 is about 689.6435447948.

The spelling of 328000138 in words is "three hundred twenty-eight million, one hundred thirty-eight", and thus it is an aban number.