3928656 has 20 divisors (see below), whose sum is σ = 10149152. Its totient is φ = 1309536.

The previous prime is 3928651. The next prime is 3928663. The reversal of 3928656 is 6568293.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3928651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40876 + ... + 40971.

Almost surely, 2^3928656 is an apocalyptic number.

It is an amenable number.

3928656 is an abundant number, since it is smaller than the sum of its proper divisors (6220496).

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

3928656 is a wasteful number, since it uses less digits than its factorization.

3928656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81858 (or 81852 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The square root of 3928656 is about 1982.0837520145. The cubic root of 3928656 is about 157.7906751049.

The spelling of 3928656 in words is "three million, nine hundred twenty-eight thousand, six hundred fifty-six".