3281381328 has 40 divisors (see below), whose sum is σ = 8657267328. Its totient is φ = 1070520832.

The previous prime is 3281381303. The next prime is 3281381329. The reversal of 3281381328 is 8231831823.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3281381329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 725001 + ... + 729512.

Almost surely, 2^3281381328 is an apocalyptic number.

It is an amenable number.

3281381328 is an abundant number, since it is smaller than the sum of its proper divisors (5375886000).

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

3281381328 is a wasteful number, since it uses less digits than its factorization.

3281381328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1454571 (or 1454565 counting only the distinct ones).

The product of its digits is 55296, while the sum is 39.

The square root of 3281381328 is about 57283.3425002417. The cubic root of 3281381328 is about 1486.0003127741. Note that the first 3 decimals are identical.

The spelling of 3281381328 in words is "three billion, two hundred eighty-one million, three hundred eighty-one thousand, three hundred twenty-eight".