520540004 has 6 divisors (see below), whose sum is σ = 910945014. Its totient is φ = 260270000.

The previous prime is 520539967. The next prime is 520540019. The reversal of 520540004 is 400045025.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 394022500 + 126517504 = 19850^2 + 11248^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65067497 + ... + 65067504.

It is an arithmetic number, because the mean of its divisors is an integer number (151824169).

Almost surely, 2^520540004 is an apocalyptic number.

It is an amenable number.

520540004 is a deficient number, since it is larger than the sum of its proper divisors (390405010).

520540004 is a wasteful number, since it uses less digits than its factorization.

520540004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130135005 (or 130135003 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 520540004 is about 22815.3458005790. The cubic root of 520540004 is about 804.4234154163.

Adding to 520540004 its reverse (400045025), we get a palindrome (920585029).

The spelling of 520540004 in words is "five hundred twenty million, five hundred forty thousand, four".