520355380 has 24 divisors (see below), whose sum is σ = 1157026248. Its totient is φ = 195898368.

The previous prime is 520355371. The next prime is 520355387. The reversal of 520355380 is 83553025.

It can be written as a sum of positive squares in 4 ways, for example, as 126967824 + 393387556 = 11268^2 + 19834^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520355387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 764889 + ... + 765568.

It is an arithmetic number, because the mean of its divisors is an integer number (48209427).

Almost surely, 2^520355380 is an apocalyptic number.

It is an amenable number.

520355380 is an abundant number, since it is smaller than the sum of its proper divisors (636670868).

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

520355380 is a wasteful number, since it uses less digits than its factorization.

520355380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1530483 (or 1530481 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 520355380 is about 22811.2993930640. The cubic root of 520355380 is about 804.3283004527.

The spelling of 520355380 in words is "five hundred twenty million, three hundred fifty-five thousand, three hundred eighty".