648608 has 12 divisors (see below), whose sum is σ = 1277010. Its totient is φ = 324288.

The previous prime is 648607. The next prime is 648617. The reversal of 648608 is 806846.

It can be written as a sum of positive squares in only one way, i.e., 478864 + 169744 = 692^2 + 412^2 .

It is a Harshad number since it is a multiple of its sum of digits (32), and also a Moran number because the ratio is a prime number: 20269 = 648608 / (6 + 4 + 8 + 6 + 0 + 8).

It is not an unprimeable number, because it can be changed into a prime (648607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10103 + ... + 10166.

2⁶⁴⁸⁶⁰⁸ is an apocalyptic number.

It is an amenable number.

648608 is a deficient number, since it is larger than the sum of its proper divisors (628402).

648608 is a wasteful number, since it uses less digits than its factorization.

648608 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20279 (or 20271 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 648608 is about 805.3620303938. The cubic root of 648608 is about 86.5620301946.

The spelling of 648608 in words is "six hundred forty-eight thousand, six hundred eight".