3216906 has 72 divisors (see below), whose sum is σ = 8797152. Its totient is φ = 831600.

The previous prime is 3216887. The next prime is 3216911. The reversal of 3216906 is 6096123.

It is a happy number.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 3216906.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 15141 + ... + 15351.

Almost surely, 2^3216906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3216906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4398576).

3216906 is an abundant number, since it is smaller than the sum of its proper divisors (5580246).

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

3216906 is a wasteful number, since it uses less digits than its factorization.

3216906 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 234 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 3216906 is about 1793.5735279046. The cubic root of 3216906 is about 147.6203135943.

It can be divided in two parts, 321 and 6906, that added together give a palindrome (7227).

The spelling of 3216906 in words is "three million, two hundred sixteen thousand, nine hundred six".