628845 has 32 divisors (see below), whose sum is σ = 1181952. Its totient is φ = 279552.

The previous prime is 628841. The next prime is 628861. The reversal of 628845 is 548826.

628845 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 628845 - 2² = 628841 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5509 + ... + 5621.

It is an arithmetic number, because the mean of its divisors is an integer number (36936).

2⁶²⁸⁸⁴⁵ is an apocalyptic number.

It is an amenable number.

628845 is a deficient number, since it is larger than the sum of its proper divisors (553107).

628845 is a wasteful number, since it uses less digits than its factorization.

628845 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181.

The product of its digits is 15360, while the sum is 33.

The square root of 628845 is about 792.9974779279. The cubic root of 628845 is about 85.6737685490.

The spelling of 628845 in words is "six hundred twenty-eight thousand, eight hundred forty-five".