328408686 has 48 divisors (see below), whose sum is σ = 754975728. Its totient is φ = 102816000.

The previous prime is 328408681. The next prime is 328408687. The reversal of 328408686 is 686804823.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328408681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 213741 + ... + 215271.

It is an arithmetic number, because the mean of its divisors is an integer number (15728661).

Almost surely, 2^328408686 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 328408686, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (377487864).

328408686 is an abundant number, since it is smaller than the sum of its proper divisors (426567042).

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

328408686 is a wasteful number, since it uses less digits than its factorization.

328408686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2257 (or 2254 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 45.

The square root of 328408686 is about 18122.0497185059. The cubic root of 328408686 is about 689.9297597057.

The spelling of 328408686 in words is "three hundred twenty-eight million, four hundred eight thousand, six hundred eighty-six".