628287 has 16 divisors (see below), whose sum is σ = 929280. Its totient is φ = 374400.

The previous prime is 628267. The next prime is 628289. The reversal of 628287 is 782826.

It is not a de Polignac number, because 628287 - 2¹¹ = 626239 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 628287.

It is not an unprimeable number, because it can be changed into a prime (628289) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2487 + ... + 2727.

It is an arithmetic number, because the mean of its divisors is an integer number (58080).

2⁶²⁸²⁸⁷ is an apocalyptic number.

628287 is a deficient number, since it is larger than the sum of its proper divisors (300993).

628287 is a wasteful number, since it uses less digits than its factorization.

628287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334.

The product of its digits is 10752, while the sum is 33.

The square root of 628287 is about 792.6455702267. The cubic root of 628287 is about 85.6484204320.

It can be divided in two parts, 62828 and 7, that added together give a triangular number (62835 = T₃₅₄).

The spelling of 628287 in words is "six hundred twenty-eight thousand, two hundred eighty-seven".