3921386256 has 60 divisors (see below), whose sum is σ = 11380906992. Its totient is φ = 1307127456.

The previous prime is 3921386201. The next prime is 3921386291. The reversal of 3921386256 is 6526831293.

3921386256 is a `hidden beast` number, since 3 + 9 + 2 + 13 + 8 + 625 + 6 = 666.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 500406 + ... + 508181.

Almost surely, 2^3921386256 is an apocalyptic number.

3921386256 is a gapful number since it is divisible by the number (36) formed by its first and last digit.

It is an amenable number.

3921386256 is an abundant number, since it is smaller than the sum of its proper divisors (7459520736).

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

3921386256 is a wasteful number, since it uses less digits than its factorization.

3921386256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1008610 (or 1008592 counting only the distinct ones).

The product of its digits is 466560, while the sum is 45.

The square root of 3921386256 is about 62620.9729723197. The cubic root of 3921386256 is about 1576.9328759398.

The spelling of 3921386256 in words is "three billion, nine hundred twenty-one million, three hundred eighty-six thousand, two hundred fifty-six".