628912 has 20 divisors (see below), whose sum is σ = 1272240. Its totient is φ = 300608.

The previous prime is 628909. The next prime is 628913. The reversal of 628912 is 219826.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (628913) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 487 + ... + 1222.

It is an arithmetic number, because the mean of its divisors is an integer number (63612).

2⁶²⁸⁹¹² is an apocalyptic number.

It is an amenable number.

628912 is an abundant number, since it is smaller than the sum of its proper divisors (643328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

628912 is a wasteful number, since it uses less digits than its factorization.

628912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1740 (or 1734 counting only the distinct ones).

The product of its digits is 1728, while the sum is 28.

The square root of 628912 is about 793.0397215777. The cubic root of 628912 is about 85.6768111316.

It can be divided in two parts, 628 and 912, that added together give a triangular number (1540 = T₅₅).

The spelling of 628912 in words is "six hundred twenty-eight thousand, nine hundred twelve".