628766 has 8 divisors (see below), whose sum is σ = 963360. Its totient is φ = 307648.

The previous prime is 628759. The next prime is 628781. The reversal of 628766 is 667826.

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

It is a congruent number.

It is an unprimeable number.

628766 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, 3251 + ... + 3438.

It is an arithmetic number, because the mean of its divisors is an integer number (120420).

2⁶²⁸⁷⁶⁶ is an apocalyptic number.

628766 is a deficient number, since it is larger than the sum of its proper divisors (334594).

628766 is a wasteful number, since it uses less digits than its factorization.

628766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6738.

The product of its digits is 24192, while the sum is 35.

The square root of 628766 is about 792.9476653601. The cubic root of 628766 is about 85.6701807485.

Subtracting 628766 from its reverse (667826), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 628766 in words is "six hundred twenty-eight thousand, seven hundred sixty-six".