628444 has 12 divisors (see below), whose sum is σ = 1157800. Its totient is φ = 297648.

The previous prime is 628427. The next prime is 628447. The reversal of 628444 is 444826.

It is a super-2 number, since 2×628444² = 789883722272, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628447) 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, 4059 + ... + 4210.

2⁶²⁸⁴⁴⁴ is an apocalyptic number.

It is an amenable number.

628444 is a deficient number, since it is larger than the sum of its proper divisors (529356).

628444 is a wasteful number, since it uses less digits than its factorization.

628444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8292 (or 8290 counting only the distinct ones).

The product of its digits is 6144, while the sum is 28.

The square root of 628444 is about 792.7445994770. The cubic root of 628444 is about 85.6555539458.

It can be divided in two parts, 6284 and 44, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 628444 in words is "six hundred twenty-eight thousand, four hundred forty-four".