628306 has 8 divisors (see below), whose sum is σ = 1077120. Its totient is φ = 269268.

The previous prime is 628301. The next prime is 628319. The reversal of 628306 is 603826.

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

It is an Ulam number.

It is a plaindrome in base 9.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (628301) by changing a digit.

628306 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, 22426 + ... + 22453.

It is an arithmetic number, because the mean of its divisors is an integer number (134640).

2⁶²⁸³⁰⁶ is an apocalyptic number.

628306 is a deficient number, since it is larger than the sum of its proper divisors (448814).

628306 is a wasteful number, since it uses less digits than its factorization.

628306 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44888.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 628306 is about 792.6575553163. The cubic root of 628306 is about 85.6492837867.

The spelling of 628306 in words is "six hundred twenty-eight thousand, three hundred six".