648328 has 8 divisors (see below), whose sum is σ = 1215630. Its totient is φ = 324160.

The previous prime is 648317. The next prime is 648331. The reversal of 648328 is 823846.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 544644 + 103684 = 738^2 + 322^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 648328.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40513 + ... + 40528.

2⁶⁴⁸³²⁸ is an apocalyptic number.

It is an amenable number.

648328 is a deficient number, since it is larger than the sum of its proper divisors (567302).

648328 is a wasteful number, since it uses less digits than its factorization.

648328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81047 (or 81043 counting only the distinct ones).

The product of its digits is 9216, while the sum is 31.

The square root of 648328 is about 805.1881767637. The cubic root of 648328 is about 86.5495723069.

The spelling of 648328 in words is "six hundred forty-eight thousand, three hundred twenty-eight".