628844 has 6 divisors (see below), whose sum is σ = 1100484. Its totient is φ = 314420.

The previous prime is 628841. The next prime is 628861. The reversal of 628844 is 448826.

It is a self number, because there is not a number n which added to its sum of digits gives 628844.

It is not an unprimeable number, because it can be changed into a prime (628841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 78602 + ... + 78609.

It is an arithmetic number, because the mean of its divisors is an integer number (183414).

2⁶²⁸⁸⁴⁴ is an apocalyptic number.

It is an amenable number.

628844 is a deficient number, since it is larger than the sum of its proper divisors (471640).

628844 is a wasteful number, since it uses less digits than its factorization.

628844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157215 (or 157213 counting only the distinct ones).

The product of its digits is 12288, while the sum is 32.

The square root of 628844 is about 792.9968474086. The cubic root of 628844 is about 85.6737231356.

It can be divided in two parts, 6288 and 44, that multiplied together give a palindrome (276672).

The spelling of 628844 in words is "six hundred twenty-eight thousand, eight hundred forty-four".