509784872 has 16 divisors (see below), whose sum is σ = 956086740. Its totient is φ = 254828416.

The previous prime is 509784827. The next prime is 509784883. The reversal of 509784872 is 278487905.

It can be written as a sum of positive squares in 2 ways, for example, as 446645956 + 63138916 = 21134^2 + 7946^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 509784872.

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, 55178 + ... + 63750.

Almost surely, 2^509784872 is an apocalyptic number.

It is an amenable number.

509784872 is a deficient number, since it is larger than the sum of its proper divisors (446301868).

509784872 is a wasteful number, since it uses less digits than its factorization.

509784872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16012 (or 16008 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 50.

The square root of 509784872 is about 22578.4160649059. The cubic root of 509784872 is about 798.8446196737.

The spelling of 509784872 in words is "five hundred nine million, seven hundred eighty-four thousand, eight hundred seventy-two".