628543 has 4 divisors (see below), whose sum is σ = 631048. Its totient is φ = 626040.

The previous prime is 628499. The next prime is 628547. The reversal of 628543 is 345826.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 628543 - 2¹³ = 620351 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (628547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 828 + ... + 1393.

It is an arithmetic number, because the mean of its divisors is an integer number (157762).

2⁶²⁸⁵⁴³ is an apocalyptic number.

628543 is a deficient number, since it is larger than the sum of its proper divisors (2505).

628543 is a wasteful number, since it uses less digits than its factorization.

628543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2504.

The product of its digits is 5760, while the sum is 28.

The square root of 628543 is about 792.8070383139. The cubic root of 628543 is about 85.6600515381.

It can be divided in two parts, 6285 and 43, that added together give a triangular number (6328 = T₁₁₂).

The spelling of 628543 in words is "six hundred twenty-eight thousand, five hundred forty-three".