628312 has 8 divisors (see below), whose sum is σ = 1178100. Its totient is φ = 314152.

The previous prime is 628301. The next prime is 628319. The reversal of 628312 is 213826.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628319) by changing a digit.

628312 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39262 + ... + 39277.

2⁶²⁸³¹² is an apocalyptic number.

It is an amenable number.

628312 is a deficient number, since it is larger than the sum of its proper divisors (549788).

628312 is a wasteful number, since it uses less digits than its factorization.

628312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78545 (or 78541 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 628312 is about 792.6613400438. The cubic root of 628312 is about 85.6495564214.

The spelling of 628312 in words is "six hundred twenty-eight thousand, three hundred twelve".