646385930 has 64 divisors (see below), whose sum is σ = 1249914240. Its totient is φ = 240194304.

The previous prime is 646385921. The next prime is 646385941. The reversal of 646385930 is 39583646.

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 31 ways as a sum of consecutive naturals, for example, 1147829 + ... + 1148391.

It is an arithmetic number, because the mean of its divisors is an integer number (19529910).

Almost surely, 2^646385930 is an apocalyptic number.

646385930 is a deficient number, since it is larger than the sum of its proper divisors (603528310).

646385930 is a wasteful number, since it uses less digits than its factorization.

646385930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 743.

The product of its (nonzero) digits is 466560, while the sum is 44.

The square root of 646385930 is about 25424.1210270876. The cubic root of 646385930 is about 864.6306596993.

The spelling of 646385930 in words is "six hundred forty-six million, three hundred eighty-five thousand, nine hundred thirty".