328563864 has 80 divisors (see below), whose sum is σ = 923196120. Its totient is φ = 109175040.

The previous prime is 328563857. The next prime is 328563869. The reversal of 328563864 is 468365823.

It is a happy number.

328563864 is a `hidden beast` number, since 3 + 2 + 8 + 5 + 638 + 6 + 4 = 666.

It is a super-2 number, since 2×328563864² = 215908425453220992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328563869) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 279999 + ... + 281169.

Almost surely, 2^328563864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328563864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (461598060).

328563864 is an abundant number, since it is smaller than the sum of its proper divisors (594632256).

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

328563864 is a wasteful number, since it uses less digits than its factorization.

328563864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1622 (or 1609 counting only the distinct ones).

The product of its digits is 829440, while the sum is 45.

The square root of 328563864 is about 18126.3306821872. The cubic root of 328563864 is about 690.0384099601.

The spelling of 328563864 in words is "three hundred twenty-eight million, five hundred sixty-three thousand, eight hundred sixty-four".