520340445 has 12 divisors (see below), whose sum is σ = 901923516. Its totient is φ = 277514880.

The previous prime is 520340393. The next prime is 520340453. The reversal of 520340445 is 544043025.

It can be written as a sum of positive squares in 2 ways, for example, as 324648324 + 195692121 = 18018^2 + 13989^2 .

It is not a de Polignac number, because 520340445 - 2⁸ = 520340189 is a prime.

It is a congruent 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 11 ways as a sum of consecutive naturals, for example, 5781516 + ... + 5781605.

It is an arithmetic number, because the mean of its divisors is an integer number (75160293).

Almost surely, 2^520340445 is an apocalyptic number.

It is an amenable number.

520340445 is a deficient number, since it is larger than the sum of its proper divisors (381583071).

520340445 is a wasteful number, since it uses less digits than its factorization.

520340445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11563132 (or 11563129 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 27.

The square root of 520340445 is about 22810.9720310205. The cubic root of 520340445 is about 804.3206052259.

The spelling of 520340445 in words is "five hundred twenty million, three hundred forty thousand, four hundred forty-five".