509142740 has 12 divisors (see below), whose sum is σ = 1069199796. Its totient is φ = 203657088.

The previous prime is 509142737. The next prime is 509142761. The reversal of 509142740 is 47241905.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 104489284 + 404653456 = 10222^2 + 20116^2 .

It is a junction number, because it is equal to n+sod(n) for n = 509142697 and 509142706.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12728549 + ... + 12728588.

It is an arithmetic number, because the mean of its divisors is an integer number (89099983).

Almost surely, 2^509142740 is an apocalyptic number.

It is an amenable number.

509142740 is an abundant number, since it is smaller than the sum of its proper divisors (560057056).

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

509142740 is a wasteful number, since it uses less digits than its factorization.

509142740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25457146 (or 25457144 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 509142740 is about 22564.1915432395. The cubic root of 509142740 is about 798.5090668741.

The spelling of 509142740 in words is "five hundred nine million, one hundred forty-two thousand, seven hundred forty".