520402305 has 32 divisors (see below), whose sum is σ = 881101440. Its totient is φ = 261550080.

The previous prime is 520402273. The next prime is 520402321. The reversal of 520402305 is 503204025.

It is not a de Polignac number, because 520402305 - 2⁵ = 520402273 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50275 + ... + 59735.

It is an arithmetic number, because the mean of its divisors is an integer number (27534420).

Almost surely, 2^520402305 is an apocalyptic number.

It is an amenable number.

520402305 is a deficient number, since it is larger than the sum of its proper divisors (360699135).

520402305 is a wasteful number, since it uses less digits than its factorization.

520402305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9681.

The product of its (nonzero) digits is 1200, while the sum is 21.

The square root of 520402305 is about 22812.3279171592. The cubic root of 520402305 is about 804.3524775008.

It can be divided in two parts, 52040 and 2305, that added together give a palindrome (54345).

The spelling of 520402305 in words is "five hundred twenty million, four hundred two thousand, three hundred five".