328639838 has 4 divisors (see below), whose sum is σ = 492959760. Its totient is φ = 164319918.

The previous prime is 328639813. The next prime is 328639877. The reversal of 328639838 is 838936823.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 838936823 = 151 ⋅5555873.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 82159958 + ... + 82159961.

It is an arithmetic number, because the mean of its divisors is an integer number (123239940).

Almost surely, 2^328639838 is an apocalyptic number.

328639838 is a deficient number, since it is larger than the sum of its proper divisors (164319922).

328639838 is a wasteful number, since it uses less digits than its factorization.

328639838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164319921.

The product of its digits is 1492992, while the sum is 50.

The square root of 328639838 is about 18128.4262416791. The cubic root of 328639838 is about 690.0915918462.

The spelling of 328639838 in words is "three hundred twenty-eight million, six hundred thirty-nine thousand, eight hundred thirty-eight".