520288391 has 16 divisors (see below), whose sum is σ = 622924800. Its totient is φ = 425119968.

The previous prime is 520288361. The next prime is 520288399. The reversal of 520288391 is 193882025.

It is not a de Polignac number, because 520288391 - 2²² = 516094087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520288399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 185 + ... + 32258.

It is an arithmetic number, because the mean of its divisors is an integer number (38932800).

Almost surely, 2^520288391 is an apocalyptic number.

520288391 is a deficient number, since it is larger than the sum of its proper divisors (102636409).

520288391 is a wasteful number, since it uses less digits than its factorization.

520288391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32558.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 520288391 is about 22809.8310164718. The cubic root of 520288391 is about 804.2937833625.

The spelling of 520288391 in words is "five hundred twenty million, two hundred eighty-eight thousand, three hundred ninety-one".