509720 has 16 divisors (see below), whose sum is σ = 1146960. Its totient is φ = 203872.

The previous prime is 509699. The next prime is 509723. The reversal of 509720 is 27905.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509723) 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, 6332 + ... + 6411.

It is an arithmetic number, because the mean of its divisors is an integer number (71685).

2⁵⁰⁹⁷²⁰ is an apocalyptic number.

It is an amenable number.

509720 is an abundant number, since it is smaller than the sum of its proper divisors (637240).

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

509720 is a wasteful number, since it uses less digits than its factorization.

509720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12754 (or 12750 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 23.

The square root of 509720 is about 713.9467767278. The cubic root of 509720 is about 79.8810732931.

The spelling of 509720 in words is "five hundred nine thousand, seven hundred twenty".