328640956 has 48 divisors (see below), whose sum is σ = 679896000. Its totient is φ = 136055808.

The previous prime is 328640941. The next prime is 328640981. The reversal of 328640956 is 659046823.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 153300 + ... + 155428.

It is an arithmetic number, because the mean of its divisors is an integer number (14164500).

Almost surely, 2^328640956 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 328640956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339948000).

328640956 is an abundant number, since it is smaller than the sum of its proper divisors (351255044).

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

328640956 is a wasteful number, since it uses less digits than its factorization.

328640956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2326 (or 2324 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 43.

The square root of 328640956 is about 18128.4570772032. The cubic root of 328640956 is about 690.0923743862.

The spelling of 328640956 in words is "three hundred twenty-eight million, six hundred forty thousand, nine hundred fifty-six".