520308447 has 8 divisors (see below), whose sum is σ = 698401200. Its totient is φ = 344544000.

The previous prime is 520308431. The next prime is 520308463. The reversal of 520308447 is 744803025.

It is an interprime number because it is at equal distance from previous prime (520308431) and next prime (520308463).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 520308447 - 2⁴ = 520308431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520301447) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 581554 + ... + 582447.

It is an arithmetic number, because the mean of its divisors is an integer number (87300150).

Almost surely, 2^520308447 is an apocalyptic number.

520308447 is a deficient number, since it is larger than the sum of its proper divisors (178092753).

520308447 is a wasteful number, since it uses less digits than its factorization.

520308447 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1164153.

The product of its (nonzero) digits is 26880, while the sum is 33.

The square root of 520308447 is about 22810.2706472326. The cubic root of 520308447 is about 804.3041178290.

The spelling of 520308447 in words is "five hundred twenty million, three hundred eight thousand, four hundred forty-seven".