648628 has 12 divisors (see below), whose sum is σ = 1143072. Its totient is φ = 322040.

The previous prime is 648619. The next prime is 648629. The reversal of 648628 is 826846.

It is a junction number, because it is equal to n+sod(n) for n = 648593 and 648602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648629) by changing a digit.

648628 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, 183 + ... + 1153.

It is an arithmetic number, because the mean of its divisors is an integer number (95256).

2⁶⁴⁸⁶²⁸ is an apocalyptic number.

It is an amenable number.

648628 is a deficient number, since it is larger than the sum of its proper divisors (494444).

648628 is a wasteful number, since it uses less digits than its factorization.

648628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1142 (or 1140 counting only the distinct ones).

The product of its digits is 18432, while the sum is 34.

The square root of 648628 is about 805.3744470742. The cubic root of 648628 is about 86.5629199066.

The spelling of 648628 in words is "six hundred forty-eight thousand, six hundred twenty-eight".