646842828 has 24 divisors (see below), whose sum is σ = 1510230960. Its totient is φ = 215481280.

The previous prime is 646842803. The next prime is 646842829. The reversal of 646842828 is 828248646.

It is not an unprimeable number, because it can be changed into a prime (646842829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4738 + ... + 36278.

It is an arithmetic number, because the mean of its divisors is an integer number (62926290).

Almost surely, 2^646842828 is an apocalyptic number.

It is an amenable number.

646842828 is an abundant number, since it is smaller than the sum of its proper divisors (863388132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

646842828 is a wasteful number, since it uses less digits than its factorization.

646842828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33257 (or 33255 counting only the distinct ones).

The product of its digits is 1179648, while the sum is 48.

The square root of 646842828 is about 25433.1049618406. The cubic root of 646842828 is about 864.8343331589.

The spelling of 646842828 in words is "six hundred forty-six million, eight hundred forty-two thousand, eight hundred twenty-eight".