509138752 has 28 divisors (see below), whose sum is σ = 1013008896. Its totient is φ = 253892480.

The previous prime is 509138731. The next prime is 509138753. The reversal of 509138752 is 257831905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (509138753) 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, 14127 + ... + 34897.

Almost surely, 2^509138752 is an apocalyptic number.

It is an amenable number.

509138752 is a deficient number, since it is larger than the sum of its proper divisors (503870144).

509138752 is a wasteful number, since it uses less digits than its factorization.

509138752 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21166 (or 21156 counting only the distinct ones).

The product of its (nonzero) digits is 75600, while the sum is 40.

The square root of 509138752 is about 22564.1031729604. The cubic root of 509138752 is about 798.5069820217.

The spelling of 509138752 in words is "five hundred nine million, one hundred thirty-eight thousand, seven hundred fifty-two".