3221688 has 32 divisors (see below), whose sum is σ = 8102160. Its totient is φ = 1067520.

The previous prime is 3221677. The next prime is 3221707. The reversal of 3221688 is 8861223.

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5506 + ... + 6062.

Almost surely, 2^3221688 is an apocalyptic number.

It is an amenable number.

3221688 is an abundant number, since it is smaller than the sum of its proper divisors (4880472).

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

3221688 is a wasteful number, since it uses less digits than its factorization.

3221688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 807 (or 803 counting only the distinct ones).

The product of its digits is 4608, while the sum is 30.

The square root of 3221688 is about 1794.9061256790. The cubic root of 3221688 is about 147.6934243038.

The spelling of 3221688 in words is "three million, two hundred twenty-one thousand, six hundred eighty-eight".