3221028 has 36 divisors (see below), whose sum is σ = 8216208. Its totient is φ = 1063920.

The previous prime is 3221017. The next prime is 3221033. The reversal of 3221028 is 8201223.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 3221028.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4375 + ... + 5057.

It is an arithmetic number, because the mean of its divisors is an integer number (228228).

Almost surely, 2^3221028 is an apocalyptic number.

It is an amenable number.

3221028 is an abundant number, since it is smaller than the sum of its proper divisors (4995180).

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

3221028 is a wasteful number, since it uses less digits than its factorization.

3221028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 819 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 3221028 is about 1794.7222626356. The cubic root of 3221028 is about 147.6833380470.

The spelling of 3221028 in words is "three million, two hundred twenty-one thousand, twenty-eight".