520622740 has 48 divisors (see below), whose sum is σ = 1199681280. Its totient is φ = 188209280.

The previous prime is 520622723. The next prime is 520622747. The reversal of 520622740 is 47226025.

It is a junction number, because it is equal to n+sod(n) for n = 520622699 and 520622708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520622747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31221 + ... + 44899.

It is an arithmetic number, because the mean of its divisors is an integer number (24993360).

Almost surely, 2^520622740 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520622740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (599840640).

520622740 is an abundant number, since it is smaller than the sum of its proper divisors (679058540).

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

520622740 is a wasteful number, since it uses less digits than its factorization.

520622740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13872 (or 13870 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 520622740 is about 22817.1588941305. The cubic root of 520622740 is about 804.4660322177.

Adding to 520622740 its reverse (47226025), we get a palindrome (567848765).

The spelling of 520622740 in words is "five hundred twenty million, six hundred twenty-two thousand, seven hundred forty".