509239904 has 12 divisors (see below), whose sum is σ = 1002566124. Its totient is φ = 254619936.

The previous prime is 509239889. The next prime is 509239909. The reversal of 509239904 is 409932905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509239909) 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 as a sum of consecutive naturals, namely, 7956842 + ... + 7956905.

It is an arithmetic number, because the mean of its divisors is an integer number (83547177).

Almost surely, 2^509239904 is an apocalyptic number.

It is an amenable number.

509239904 is a deficient number, since it is larger than the sum of its proper divisors (493326220).

509239904 is a wasteful number, since it uses less digits than its factorization.

509239904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15913757 (or 15913749 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 41.

The square root of 509239904 is about 22566.3444979465. The cubic root of 509239904 is about 798.5598590482.

The spelling of 509239904 in words is "five hundred nine million, two hundred thirty-nine thousand, nine hundred four".