328438816 has 24 divisors (see below), whose sum is σ = 661654224. Its totient is φ = 160399680.

The previous prime is 328438813. The next prime is 328438837. The reversal of 328438816 is 618834823.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (328438813) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 117970 + ... + 120721.

It is an arithmetic number, because the mean of its divisors is an integer number (27568926).

Almost surely, 2^328438816 is an apocalyptic number.

It is an amenable number.

328438816 is an abundant number, since it is smaller than the sum of its proper divisors (333215408).

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

328438816 is a wasteful number, since it uses less digits than its factorization.

328438816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238744 (or 238736 counting only the distinct ones).

The product of its digits is 221184, while the sum is 43.

The square root of 328438816 is about 18122.8810071688. The cubic root of 328438816 is about 689.9508583640.

The spelling of 328438816 in words is "three hundred twenty-eight million, four hundred thirty-eight thousand, eight hundred sixteen".