628606 has 8 divisors (see below), whose sum is σ = 1028664. Its totient is φ = 285720.

The previous prime is 628591. The next prime is 628651. The reversal of 628606 is 606826.

It is a happy number.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14265 + ... + 14308.

It is an arithmetic number, because the mean of its divisors is an integer number (128583).

2⁶²⁸⁶⁰⁶ is an apocalyptic number.

628606 is a deficient number, since it is larger than the sum of its proper divisors (400058).

628606 is a wasteful number, since it uses less digits than its factorization.

628606 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28586.

The product of its (nonzero) digits is 3456, while the sum is 28.

The square root of 628606 is about 792.8467695589. The cubic root of 628606 is about 85.6629133964.

It can be divided in two parts, 62 and 8606, that added together give a palindrome (8668).

The spelling of 628606 in words is "six hundred twenty-eight thousand, six hundred six".