648889568 has 48 divisors (see below), whose sum is σ = 1299674880. Its totient is φ = 318854016.

The previous prime is 648889537. The next prime is 648889583. The reversal of 648889568 is 865988846.

It is a self number, because there is not a number n which added to its sum of digits gives 648889568.

It is a congruent number.

It is an unprimeable number.

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, 714971 + ... + 715877.

It is an arithmetic number, because the mean of its divisors is an integer number (27076560).

Almost surely, 2^648889568 is an apocalyptic number.

It is an amenable number.

648889568 is an abundant number, since it is smaller than the sum of its proper divisors (650785312).

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

648889568 is a wasteful number, since it uses less digits than its factorization.

648889568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1279 (or 1271 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 62.

The square root of 648889568 is about 25473.3108959161. The cubic root of 648889568 is about 865.7455423160.

The spelling of 648889568 in words is "six hundred forty-eight million, eight hundred eighty-nine thousand, five hundred sixty-eight".