509238 has 24 divisors (see below), whose sum is σ = 1162200. Its totient is φ = 160704.

The previous prime is 509227. The next prime is 509239. The reversal of 509238 is 832905.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509239) 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, 403 + ... + 1086.

It is an arithmetic number, because the mean of its divisors is an integer number (48425).

2⁵⁰⁹²³⁸ is an apocalyptic number.

509238 is an abundant number, since it is smaller than the sum of its proper divisors (652962).

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

509238 is a wasteful number, since it uses less digits than its factorization.

509238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1516 (or 1513 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The square root of 509238 is about 713.6091367128. The cubic root of 509238 is about 79.8558863800.

It can be divided in two parts, 509 and 238, that added together give a palindrome (747).

The spelling of 509238 in words is "five hundred nine thousand, two hundred thirty-eight".