628812 has 18 divisors (see below), whose sum is σ = 1589588. Its totient is φ = 209592.

The previous prime is 628811. The next prime is 628819. The reversal of 628812 is 218826.

It is a tau number, because it is divible by the number of its divisors (18).

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628812.

It is not an unprimeable number, because it can be changed into a prime (628811) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8698 + ... + 8769.

2⁶²⁸⁸¹² is an apocalyptic number.

It is an amenable number.

628812 is an abundant number, since it is smaller than the sum of its proper divisors (960776).

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

628812 is a wasteful number, since it uses less digits than its factorization.

628812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17477 (or 17472 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 628812 is about 792.9766705269. The cubic root of 628812 is about 85.6722698840.

The spelling of 628812 in words is "six hundred twenty-eight thousand, eight hundred twelve".