520456530 has 128 divisors (see below), whose sum is σ = 1457346816. Its totient is φ = 117555200.

The previous prime is 520456511. The next prime is 520456537. The reversal of 520456530 is 35654025.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (520456537) 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 63 ways as a sum of consecutive naturals, for example, 633520 + ... + 634340.

It is an arithmetic number, because the mean of its divisors is an integer number (11385522).

Almost surely, 2^520456530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520456530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (728673408).

520456530 is an abundant number, since it is smaller than the sum of its proper divisors (936890286).

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

520456530 is a wasteful number, since it uses less digits than its factorization.

520456530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972.

The product of its (nonzero) digits is 18000, while the sum is 30.

The square root of 520456530 is about 22813.5163883168. The cubic root of 520456530 is about 804.3804138991.

The spelling of 520456530 in words is "five hundred twenty million, four hundred fifty-six thousand, five hundred thirty".