509390 has 32 divisors (see below), whose sum is σ = 1105920. Its totient is φ = 165024.

The previous prime is 509389. The next prime is 509393. The reversal of 509390 is 93905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509393) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1139 + ... + 1521.

It is an arithmetic number, because the mean of its divisors is an integer number (34560).

2⁵⁰⁹³⁹⁰ is an apocalyptic number.

509390 is an abundant number, since it is smaller than the sum of its proper divisors (596530).

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

509390 is a wasteful number, since it uses less digits than its factorization.

509390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 416.

The product of its (nonzero) digits is 1215, while the sum is 26.

The square root of 509390 is about 713.7156296453. The cubic root of 509390 is about 79.8638308561.

The spelling of 509390 in words is "five hundred nine thousand, three hundred ninety".