328866638 has 8 divisors (see below), whose sum is σ = 494602680. Its totient is φ = 163999080.

The previous prime is 328866613. The next prime is 328866647. The reversal of 328866638 is 836668823.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

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, 216173 + ... + 217688.

It is an arithmetic number, because the mean of its divisors is an integer number (61825335).

Almost surely, 2^328866638 is an apocalyptic number.

328866638 is a deficient number, since it is larger than the sum of its proper divisors (165736042).

328866638 is a wasteful number, since it uses less digits than its factorization.

328866638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434242.

The product of its digits is 1990656, while the sum is 50.

The square root of 328866638 is about 18134.6805320634. The cubic root of 328866638 is about 690.2503033642.

The spelling of 328866638 in words is "three hundred twenty-eight million, eight hundred sixty-six thousand, six hundred thirty-eight".