507438865 has 16 divisors (see below), whose sum is σ = 645812352. Its totient is φ = 381439744.

The previous prime is 507438859. The next prime is 507438889. The reversal of 507438865 is 568834705.

It is not a de Polignac number, because 507438865 - 2⁹ = 507438353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50382 + ... + 59608.

It is an arithmetic number, because the mean of its divisors is an integer number (40363272).

Almost surely, 2^507438865 is an apocalyptic number.

It is an amenable number.

507438865 is a deficient number, since it is larger than the sum of its proper divisors (138373487).

507438865 is a wasteful number, since it uses less digits than its factorization.

507438865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9896.

The product of its (nonzero) digits is 806400, while the sum is 46.

The square root of 507438865 is about 22526.4037298456. The cubic root of 507438865 is about 797.6173194411.

The spelling of 507438865 in words is "five hundred seven million, four hundred thirty-eight thousand, eight hundred sixty-five".