520540730 has 16 divisors (see below), whose sum is σ = 938624544. Its totient is φ = 207849360.

The previous prime is 520540729. The next prime is 520540781. The reversal of 520540730 is 37045025.

It is a self number, because there is not a number n which added to its sum of digits gives 520540730.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39872 + ... + 51291.

It is an arithmetic number, because the mean of its divisors is an integer number (58664034).

Almost surely, 2^520540730 is an apocalyptic number.

520540730 is a deficient number, since it is larger than the sum of its proper divisors (418083814).

520540730 is a wasteful number, since it uses less digits than its factorization.

520540730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91741.

The product of its (nonzero) digits is 4200, while the sum is 26.

The square root of 520540730 is about 22815.3617109175. The cubic root of 520540730 is about 804.4237893941.

Adding to 520540730 its reverse (37045025), we get a palindrome (557585755).

The spelling of 520540730 in words is "five hundred twenty million, five hundred forty thousand, seven hundred thirty".