628806 has 8 divisors (see below), whose sum is σ = 1257624. Its totient is φ = 209600.

The previous prime is 628801. The next prime is 628811. The reversal of 628806 is 608826.

It is an interprime number because it is at equal distance from previous prime (628801) and next prime (628811).

It is a sphenic number, since it is the product of 3 distinct primes.

628806 is an admirable number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628806.

It is not an unprimeable number, because it can be changed into a prime (628801) by changing a digit.

628806 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 3 ways as a sum of consecutive naturals, for example, 52395 + ... + 52406.

It is an arithmetic number, because the mean of its divisors is an integer number (157203).

2⁶²⁸⁸⁰⁶ is an apocalyptic number.

628806 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

628806 is a wasteful number, since it uses less digits than its factorization.

628806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104806.

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 628806 is about 792.9728873045. The cubic root of 628806 is about 85.6719973939.

The spelling of 628806 in words is "six hundred twenty-eight thousand, eight hundred six".