3215856 has 80 divisors (see below), whose sum is σ = 10070784. Its totient is φ = 863232.

The previous prime is 3215833. The next prime is 3215879. The reversal of 3215856 is 6585123.

It is an interprime number because it is at equal distance from previous prime (3215833) and next prime (3215879).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5431 + ... + 5993.

Almost surely, 2^3215856 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 3215856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5035392).

3215856 is an abundant number, since it is smaller than the sum of its proper divisors (6854928).

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

3215856 is a wasteful number, since it uses less digits than its factorization.

3215856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598 (or 592 counting only the distinct ones).

The product of its digits is 7200, while the sum is 30.

The square root of 3215856 is about 1793.2807922910. The cubic root of 3215856 is about 147.6042507277.

The spelling of 3215856 in words is "three million, two hundred fifteen thousand, eight hundred fifty-six".