509430 has 16 divisors (see below), whose sum is σ = 1222704. Its totient is φ = 135840.

The previous prime is 509429. The next prime is 509441. The reversal of 509430 is 34905.

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

It is a junction number, because it is equal to n+sod(n) for n = 509397 and 509406.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 8461 + ... + 8520.

It is an arithmetic number, because the mean of its divisors is an integer number (76419).

2⁵⁰⁹⁴³⁰ is an apocalyptic number.

509430 is an abundant number, since it is smaller than the sum of its proper divisors (713274).

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

509430 is a wasteful number, since it uses less digits than its factorization.

509430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16991.

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 509430 is about 713.7436514604. The cubic root of 509430 is about 79.8659212450.

It can be divided in two parts, 509 and 430, that added together give a palindrome (939).

The spelling of 509430 in words is "five hundred nine thousand, four hundred thirty".