628636 has 12 divisors (see below), whose sum is σ = 1148112. Its totient is φ = 300608.

The previous prime is 628591. The next prime is 628651. The reversal of 628636 is 636826.

It is a junction number, because it is equal to n+sod(n) for n = 628598 and 628607.

It is a congruent number.

It is an unprimeable number.

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, 3325 + ... + 3508.

It is an arithmetic number, because the mean of its divisors is an integer number (95676).

2⁶²⁸⁶³⁶ is an apocalyptic number.

It is an amenable number.

628636 is a deficient number, since it is larger than the sum of its proper divisors (519476).

628636 is a wasteful number, since it uses less digits than its factorization.

628636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6860 (or 6858 counting only the distinct ones).

The product of its digits is 10368, while the sum is 31.

The square root of 628636 is about 792.8656884996. The cubic root of 628636 is about 85.6642761188.

The spelling of 628636 in words is "six hundred twenty-eight thousand, six hundred thirty-six".