3215428 has 6 divisors (see below), whose sum is σ = 5627006. Its totient is φ = 1607712.

The previous prime is 3215417. The next prime is 3215447. The reversal of 3215428 is 8245123.

It can be written as a sum of positive squares in only one way, i.e., 3069504 + 145924 = 1752^2 + 382^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 401925 + ... + 401932.

Almost surely, 2^3215428 is an apocalyptic number.

It is an amenable number.

3215428 is a deficient number, since it is larger than the sum of its proper divisors (2411578).

3215428 is a wasteful number, since it uses less digits than its factorization.

3215428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 803861 (or 803859 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 3215428 is about 1793.1614539689. The cubic root of 3215428 is about 147.5977021942.

The spelling of 3215428 in words is "three million, two hundred fifteen thousand, four hundred twenty-eight".