1646468228 has 12 divisors (see below), whose sum is σ = 2894014032. Its totient is φ = 819607080.

The previous prime is 1646468209. The next prime is 1646468269. The reversal of 1646468228 is 8228646461.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 905738 + ... + 907553.

It is an arithmetic number, because the mean of its divisors is an integer number (241167836).

Almost surely, 2^1646468228 is an apocalyptic number.

It is an amenable number.

1646468228 is a deficient number, since it is larger than the sum of its proper divisors (1247545804).

1646468228 is a wasteful number, since it uses less digits than its factorization.

1646468228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1813522 (or 1813520 counting only the distinct ones).

The product of its digits is 884736, while the sum is 47.

The square root of 1646468228 is about 40576.6956269236. The cubic root of 1646468228 is about 1180.8220423434.

The spelling of 1646468228 in words is "one billion, six hundred forty-six million, four hundred sixty-eight thousand, two hundred twenty-eight".