646904480 has 48 divisors (see below), whose sum is σ = 1529902080. Its totient is φ = 258492672.

The previous prime is 646904477. The next prime is 646904507. The reversal of 646904480 is 84409646.

646904480 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 236561 + ... + 239279.

It is an arithmetic number, because the mean of its divisors is an integer number (31872960).

Almost surely, 2^646904480 is an apocalyptic number.

It is an amenable number.

646904480 is an abundant number, since it is smaller than the sum of its proper divisors (882997600).

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

646904480 is a wasteful number, since it uses less digits than its factorization.

646904480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4221 (or 4213 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 646904480 is about 25434.3169752993. The cubic root of 646904480 is about 864.8618087012.

The spelling of 646904480 in words is "six hundred forty-six million, nine hundred four thousand, four hundred eighty".