509020 has 24 divisors (see below), whose sum is σ = 1104768. Its totient is φ = 196800.

The previous prime is 508987. The next prime is 509023. The reversal of 509020 is 20905.

It is a junction number, because it is equal to n+sod(n) for n = 508985 and 509003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509023) by changing a digit.

509020 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 210 + ... + 1030.

It is an arithmetic number, because the mean of its divisors is an integer number (46032).

2⁵⁰⁹⁰²⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 509020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (552384).

509020 is an abundant number, since it is smaller than the sum of its proper divisors (595748).

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

509020 is a wasteful number, since it uses less digits than its factorization.

509020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 861 (or 859 counting only the distinct ones).

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 509020 is about 713.4563756811. The cubic root of 509020 is about 79.8444895689.

Adding to 509020 its reverse (20905), we get a palindrome (529925).

The spelling of 509020 in words is "five hundred nine thousand, twenty".