3222728 has 16 divisors (see below), whose sum is σ = 6106380. Its totient is φ = 1594368.

The previous prime is 3222727. The next prime is 3222763. The reversal of 3222728 is 8272223.

It can be written as a sum of positive squares in 2 ways, for example, as 2815684 + 407044 = 1678^2 + 638^2 .

It is a junction number, because it is equal to n+sod(n) for n = 3222697 and 3222706.

It is not an unprimeable number, because it can be changed into a prime (3222727) 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, 1301 + ... + 2852.

Almost surely, 2^3222728 is an apocalyptic number.

It is an amenable number.

3222728 is a deficient number, since it is larger than the sum of its proper divisors (2883652).

3222728 is a wasteful number, since it uses less digits than its factorization.

3222728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256 (or 4252 counting only the distinct ones).

The product of its digits is 2688, while the sum is 26.

The square root of 3222728 is about 1795.1958110468. The cubic root of 3222728 is about 147.7093150042.

The spelling of 3222728 in words is "three million, two hundred twenty-two thousand, seven hundred twenty-eight".