509394 has 16 divisors (see below), whose sum is σ = 1033632. Its totient is φ = 167328.

The previous prime is 509393. The next prime is 509413. The reversal of 509394 is 493905.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (509393) 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 7 ways as a sum of consecutive naturals, for example, 144 + ... + 1019.

It is an arithmetic number, because the mean of its divisors is an integer number (64602).

2⁵⁰⁹³⁹⁴ is an apocalyptic number.

509394 is an abundant number, since it is smaller than the sum of its proper divisors (524238).

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

509394 is a wasteful number, since it uses less digits than its factorization.

509394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1241.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 509394 is about 713.7184318763. The cubic root of 509394 is about 79.8640398999.

It can be divided in two parts, 509 and 394, that added together give a triangular number (903 = T₄₂).

The spelling of 509394 in words is "five hundred nine thousand, three hundred ninety-four".