628648 has 16 divisors (see below), whose sum is σ = 1188000. Its totient is φ = 311856.

The previous prime is 628591. The next prime is 628651. The reversal of 628648 is 846826.

628648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1213 + ... + 1651.

It is an arithmetic number, because the mean of its divisors is an integer number (74250).

2⁶²⁸⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

628648 is a deficient number, since it is larger than the sum of its proper divisors (559352).

628648 is a wasteful number, since it uses less digits than its factorization.

628648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624 (or 620 counting only the distinct ones).

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

The square root of 628648 is about 792.8732559495. The cubic root of 628648 is about 85.6648211957.

The spelling of 628648 in words is "six hundred twenty-eight thousand, six hundred forty-eight".