628656 has 40 divisors (see below), whose sum is σ = 1857024. Its totient is φ = 179520.

The previous prime is 628651. The next prime is 628673. The reversal of 628656 is 656826.

628656 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628656.

It is not an unprimeable number, because it can be changed into a prime (628651) by changing a digit.

628656 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 600 + ... + 1271.

2⁶²⁸⁶⁵⁶ is an apocalyptic number.

It is an amenable number.

628656 is an abundant number, since it is smaller than the sum of its proper divisors (1228368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628656 is a wasteful number, since it uses less digits than its factorization.

628656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1889 (or 1883 counting only the distinct ones).

The product of its digits is 17280, while the sum is 33.

The square root of 628656 is about 792.8783008760. The cubic root of 628656 is about 85.6651845764.

The spelling of 628656 in words is "six hundred twenty-eight thousand, six hundred fifty-six".