3243856 has 40 divisors (see below), whose sum is σ = 7838784. Its totient is φ = 1263360.

The previous prime is 3243841. The next prime is 3243859. The reversal of 3243856 is 6583423.

It is a Smith number, since the sum of its digits (31) 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 (3243859) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85 + ... + 2548.

Almost surely, 2^3243856 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 3243856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3919392).

3243856 is an abundant number, since it is smaller than the sum of its proper divisors (4594928).

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

3243856 is a wasteful number, since it uses less digits than its factorization.

3243856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2659 (or 2653 counting only the distinct ones).

The product of its digits is 17280, while the sum is 31.

The square root of 3243856 is about 1801.0707926120. The cubic root of 3243856 is about 148.0314031245.

The spelling of 3243856 in words is "three million, two hundred forty-three thousand, eight hundred fifty-six".