520000004 has 6 divisors (see below), whose sum is σ = 910000014. Its totient is φ = 260000000.

The previous prime is 519999979. The next prime is 520000009. The reversal of 520000004 is 400000025.

It can be written as a sum of positive squares in only one way, i.e., 312582400 + 207417604 = 17680^2 + 14402^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 520000004.

It is not an unprimeable number, because it can be changed into a prime (520000009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64999997 + ... + 65000004.

It is an arithmetic number, because the mean of its divisors is an integer number (151666669).

Almost surely, 2^520000004 is an apocalyptic number.

It is an amenable number.

520000004 is a deficient number, since it is larger than the sum of its proper divisors (390000010).

520000004 is a wasteful number, since it uses less digits than its factorization.

520000004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130000005 (or 130000003 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 11.

The square root of 520000004 is about 22803.5085896886. The cubic root of 520000004 is about 804.1451537797.

Adding to 520000004 its reverse (400000025), we get a palindrome (920000029).

The spelling of 520000004 in words is "five hundred twenty million, four", and thus it is an aban number.