520439820 has 24 divisors (see below), whose sum is σ = 1457231664. Its totient is φ = 138783936.

The previous prime is 520439737. The next prime is 520439831. The reversal of 520439820 is 28934025.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4336939 + ... + 4337058.

It is an arithmetic number, because the mean of its divisors is an integer number (60717986).

Almost surely, 2^520439820 is an apocalyptic number.

It is an amenable number.

520439820 is an abundant number, since it is smaller than the sum of its proper divisors (936791844).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

520439820 is a wasteful number, since it uses less digits than its factorization.

520439820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8674009 (or 8674007 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 520439820 is about 22813.1501551189. The cubic root of 520439820 is about 804.3718052131.

The spelling of 520439820 in words is "five hundred twenty million, four hundred thirty-nine thousand, eight hundred twenty".