3931328 has 56 divisors (see below), whose sum is σ = 8503920. Its totient is φ = 1797120.

The previous prime is 3931307. The next prime is 3931331. The reversal of 3931328 is 8231393.

It is a self number, because there is not a number n which added to its sum of digits gives 3931328.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64418 + ... + 64478.

Almost surely, 2^3931328 is an apocalyptic number.

3931328 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3931328, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4251960).

3931328 is an abundant number, since it is smaller than the sum of its proper divisors (4572592).

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

3931328 is a wasteful number, since it uses less digits than its factorization.

3931328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145 (or 135 counting only the distinct ones).

The product of its digits is 3888, while the sum is 29.

The square root of 3931328 is about 1982.7576755620. The cubic root of 3931328 is about 157.8264397646.

The spelling of 3931328 in words is "three million, nine hundred thirty-one thousand, three hundred twenty-eight".