628569 has 12 divisors (see below), whose sum is σ = 914992. Its totient is φ = 415800.

The previous prime is 628561. The next prime is 628583. The reversal of 628569 is 965826.

It is not a de Polignac number, because 628569 - 2³ = 628561 is a prime.

It is a super-2 number, since 2×628569² = 790197975522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (628561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1734 + ... + 2064.

2⁶²⁸⁵⁶⁹ is an apocalyptic number.

It is an amenable number.

628569 is a deficient number, since it is larger than the sum of its proper divisors (286423).

628569 is a wasteful number, since it uses less digits than its factorization.

628569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 548 (or 545 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 628569 is about 792.8234355769. The cubic root of 628569 is about 85.6612326456.

The spelling of 628569 in words is "six hundred twenty-eight thousand, five hundred sixty-nine".