3278728 has 8 divisors (see below), whose sum is σ = 6147630. Its totient is φ = 1639360.

The previous prime is 3278701. The next prime is 3278741. The reversal of 3278728 is 8278723.

It can be written as a sum of positive squares in only one way, i.e., 2896804 + 381924 = 1702^2 + 618^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204913 + ... + 204928.

Almost surely, 2^3278728 is an apocalyptic number.

It is an amenable number.

3278728 is a deficient number, since it is larger than the sum of its proper divisors (2868902).

3278728 is a wasteful number, since it uses less digits than its factorization.

3278728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 409847 (or 409843 counting only the distinct ones).

The product of its digits is 37632, while the sum is 37.

The square root of 3278728 is about 1810.7258213214. The cubic root of 3278728 is about 148.5599677691.

The spelling of 3278728 in words is "three million, two hundred seventy-eight thousand, seven hundred twenty-eight".