3943856 has 40 divisors (see below), whose sum is σ = 9118464. Its totient is φ = 1615680.

The previous prime is 3943853. The next prime is 3943859. The reversal of 3943856 is 6583493.

3943856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3943853) and next prime (3943859).

It is not an unprimeable number, because it can be changed into a prime (3943853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1811 + ... + 3341.

Almost surely, 2^3943856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3943856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4559232).

3943856 is an abundant number, since it is smaller than the sum of its proper divisors (5174608).

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

3943856 is a wasteful number, since it uses less digits than its factorization.

3943856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569 (or 1563 counting only the distinct ones).

The product of its digits is 77760, while the sum is 38.

The square root of 3943856 is about 1985.9143989608. The cubic root of 3943856 is about 157.9939109975.

The spelling of 3943856 in words is "three million, nine hundred forty-three thousand, eight hundred fifty-six".