509140 has 12 divisors (see below), whose sum is σ = 1069236. Its totient is φ = 203648.

The previous prime is 509137. The next prime is 509147. The reversal of 509140 is 41905.

It can be written as a sum of positive squares in 2 ways, for example, as 76176 + 432964 = 276^2 + 658^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12709 + ... + 12748.

It is an arithmetic number, because the mean of its divisors is an integer number (89103).

2⁵⁰⁹¹⁴⁰ is an apocalyptic number.

It is an amenable number.

509140 is an abundant number, since it is smaller than the sum of its proper divisors (560096).

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

509140 is a wasteful number, since it uses less digits than its factorization.

509140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25466 (or 25464 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 509140 is about 713.5404683688. The cubic root of 509140 is about 79.8507634454.

The spelling of 509140 in words is "five hundred nine thousand, one hundred forty".