3220638 has 8 divisors (see below), whose sum is σ = 6441288. Its totient is φ = 1073544.

The previous prime is 3220627. The next prime is 3220639. The reversal of 3220638 is 8360223.

It is a sphenic number, since it is the product of 3 distinct primes.

3220638 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220639) 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, 268381 + ... + 268392.

It is an arithmetic number, because the mean of its divisors is an integer number (805161).

Almost surely, 2^3220638 is an apocalyptic number.

3220638 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

3220638 is a wasteful number, since it uses less digits than its factorization.

3220638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536778.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 3220638 is about 1794.6136074375. The cubic root of 3220638 is about 147.6773773386.

The spelling of 3220638 in words is "three million, two hundred twenty thousand, six hundred thirty-eight".