3256439028 has 12 divisors (see below), whose sum is σ = 7598357760. Its totient is φ = 1085479672.

The previous prime is 3256439027. The next prime is 3256439047. The reversal of 3256439028 is 8209346523.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3256439027) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 135684948 + ... + 135684971.

It is an arithmetic number, because the mean of its divisors is an integer number (633196480).

Almost surely, 2^3256439028 is an apocalyptic number.

It is an amenable number.

3256439028 is an abundant number, since it is smaller than the sum of its proper divisors (4341918732).

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

3256439028 is a wasteful number, since it uses less digits than its factorization.

3256439028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271369926 (or 271369924 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The square root of 3256439028 is about 57065.2173219379. The cubic root of 3256439028 is about 1482.2256245221.

The spelling of 3256439028 in words is "three billion, two hundred fifty-six million, four hundred thirty-nine thousand, twenty-eight".