648556 has 12 divisors (see below), whose sum is σ = 1174320. Its totient is φ = 313040.

The previous prime is 648509. The next prime is 648563. The reversal of 648556 is 655846.

It is an unprimeable number.

648556 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2680 + ... + 2911.

It is an arithmetic number, because the mean of its divisors is an integer number (97860).

2⁶⁴⁸⁵⁵⁶ is an apocalyptic number.

It is an amenable number.

648556 is a deficient number, since it is larger than the sum of its proper divisors (525764).

648556 is a wasteful number, since it uses less digits than its factorization.

648556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5624 (or 5622 counting only the distinct ones).

The product of its digits is 28800, while the sum is 34.

The square root of 648556 is about 805.3297461289. The cubic root of 648556 is about 86.5597168580.

The spelling of 648556 in words is "six hundred forty-eight thousand, five hundred fifty-six".