646808480 has 48 divisors (see below), whose sum is σ = 1529902080. Its totient is φ = 258415872.

The previous prime is 646808467. The next prime is 646808527. The reversal of 646808480 is 84808646.

It is a super-2 number, since 2×646808480² = 836722419599820800, which contains 22 as substring.

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, 172061 + ... + 175779.

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

Almost surely, 2^646808480 is an apocalyptic number.

It is an amenable number.

646808480 is an abundant number, since it is smaller than the sum of its proper divisors (883093600).

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

646808480 is a wasteful number, since it uses less digits than its factorization.

646808480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4821 (or 4813 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 44.

The square root of 646808480 is about 25432.4296912426. The cubic root of 646808480 is about 864.8190250324.

The spelling of 646808480 in words is "six hundred forty-six million, eight hundred eight thousand, four hundred eighty".