520072385 has 16 divisors (see below), whose sum is σ = 714427776. Its totient is φ = 356028288.

The previous prime is 520072379. The next prime is 520072409. The reversal of 520072385 is 583270025.

It is not a de Polignac number, because 520072385 - 2⁴ = 520072369 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 (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9554 + ... + 33636.

It is an arithmetic number, because the mean of its divisors is an integer number (44651736).

Almost surely, 2^520072385 is an apocalyptic number.

It is an amenable number.

520072385 is a deficient number, since it is larger than the sum of its proper divisors (194355391).

520072385 is a wasteful number, since it uses less digits than its factorization.

520072385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24712.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 520072385 is about 22805.0955928713. The cubic root of 520072385 is about 804.1824628371.

The spelling of 520072385 in words is "five hundred twenty million, seventy-two thousand, three hundred eighty-five".