520720970 has 64 divisors (see below), whose sum is σ = 1195831296. Its totient is φ = 158518080.

The previous prime is 520720909. The next prime is 520720979. The reversal of 520720970 is 79027025.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (520720979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25247 + ... + 40973.

It is an arithmetic number, because the mean of its divisors is an integer number (18684864).

Almost surely, 2^520720970 is an apocalyptic number.

520720970 is an abundant number, since it is smaller than the sum of its proper divisors (675110326).

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

520720970 is a wasteful number, since it uses less digits than its factorization.

520720970 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15795.

The product of its (nonzero) digits is 8820, while the sum is 32.

The square root of 520720970 is about 22819.3113393021. The cubic root of 520720970 is about 804.5166240204.

Adding to 520720970 its reverse (79027025), we get a palindrome (599747995).

The spelling of 520720970 in words is "five hundred twenty million, seven hundred twenty thousand, nine hundred seventy".