628566 has 8 divisors (see below), whose sum is σ = 1257144. Its totient is φ = 209520.

The previous prime is 628561. The next prime is 628583. The reversal of 628566 is 665826.

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

628566 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628561) by changing a digit.

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, 52375 + ... + 52386.

It is an arithmetic number, because the mean of its divisors is an integer number (157143).

2⁶²⁸⁵⁶⁶ is an apocalyptic number.

628566 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.

628566 is a wasteful number, since it uses less digits than its factorization.

628566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104766.

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

The square root of 628566 is about 792.8215436023. The cubic root of 628566 is about 85.6610963657.

It can be divided in two parts, 6 and 28566, that multiplied together give a square (171396 = 414²).

The spelling of 628566 in words is "six hundred twenty-eight thousand, five hundred sixty-six".