520320442 has 4 divisors (see below), whose sum is σ = 780480666. Its totient is φ = 260160220.

The previous prime is 520320413. The next prime is 520320457. The reversal of 520320442 is 244023025.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 518882841 + 1437601 = 22779^2 + 1199^2 .

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax 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 as a sum of consecutive naturals, namely, 130080109 + ... + 130080112.

Almost surely, 2^520320442 is an apocalyptic number.

520320442 is a deficient number, since it is larger than the sum of its proper divisors (260160224).

520320442 is a wasteful number, since it uses less digits than its factorization.

520320442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260160223.

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 520320442 is about 22810.5335755216. The cubic root of 520320442 is about 804.3102984922.

Adding to 520320442 its reverse (244023025), we get a palindrome (764343467).

The spelling of 520320442 in words is "five hundred twenty million, three hundred twenty thousand, four hundred forty-two".