509538 has 16 divisors (see below), whose sum is σ = 1027296. Its totient is φ = 168480.

The previous prime is 509521. The next prime is 509543. The reversal of 509538 is 835905.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 718 + ... + 1238.

It is an arithmetic number, because the mean of its divisors is an integer number (64206).

2⁵⁰⁹⁵³⁸ is an apocalyptic number.

509538 is an abundant number, since it is smaller than the sum of its proper divisors (517758).

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

509538 is a wasteful number, since it uses less digits than its factorization.

509538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 509538 is about 713.8193048664. The cubic root of 509538 is about 79.8715647485.

The spelling of 509538 in words is "five hundred nine thousand, five hundred thirty-eight".