520515072 has 400 divisors, whose sum is σ = 1948839552. Its totient is φ = 134369280.

The previous prime is 520515071. The next prime is 520515097. The reversal of 520515072 is 270515025.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520515071) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3193263 + ... + 3193425.

Almost surely, 2^520515072 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 520515072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (974419776).

520515072 is an abundant number, since it is smaller than the sum of its proper divisors (1428324480).

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

520515072 is a wasteful number, since it uses less digits than its factorization.

520515072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211 (or 186 counting only the distinct ones).

The product of its (nonzero) digits is 3500, while the sum is 27.

The square root of 520515072 is about 22814.7994074022. The cubic root of 520515072 is about 804.4105722120.

The spelling of 520515072 in words is "five hundred twenty million, five hundred fifteen thousand, seventy-two".