646965028 has 12 divisors (see below), whose sum is σ = 1132492032. Its totient is φ = 323395880.

The previous prime is 646965023. The next prime is 646965037. The reversal of 646965028 is 820569646.

It is not an unprimeable number, because it can be changed into a prime (646965023) 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, 3088 + ... + 36103.

It is an arithmetic number, because the mean of its divisors is an integer number (94374336).

Almost surely, 2^646965028 is an apocalyptic number.

It is an amenable number.

646965028 is a deficient number, since it is larger than the sum of its proper divisors (485527004).

646965028 is a wasteful number, since it uses less digits than its factorization.

646965028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43322 (or 43320 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 46.

The square root of 646965028 is about 25435.5072290686. The cubic root of 646965028 is about 864.8887905410. Note that the first 3 decimals are identical.

The spelling of 646965028 in words is "six hundred forty-six million, nine hundred sixty-five thousand, twenty-eight".