648646288 has 20 divisors (see below), whose sum is σ = 1330679340. Its totient is φ = 305245184.

The previous prime is 648646279. The next prime is 648646291. The reversal of 648646288 is 882646846.

It can be written as a sum of positive squares in 2 ways, for example, as 188457984 + 460188304 = 13728^2 + 21452^2 .

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 3 ways as a sum of consecutive naturals, for example, 1192093 + ... + 1192636.

It is an arithmetic number, because the mean of its divisors is an integer number (66533967).

Almost surely, 2^648646288 is an apocalyptic number.

648646288 is a gapful number since it is divisible by the number (68) formed by its first and last digit.

It is an amenable number.

648646288 is an abundant number, since it is smaller than the sum of its proper divisors (682033052).

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

648646288 is a wasteful number, since it uses less digits than its factorization.

648646288 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2384754 (or 2384748 counting only the distinct ones).

The product of its digits is 3538944, while the sum is 52.

The square root of 648646288 is about 25468.5352543094. The cubic root of 648646288 is about 865.6373344313.

The spelling of 648646288 in words is "six hundred forty-eight million, six hundred forty-six thousand, two hundred eighty-eight".