520874856 has 96 divisors (see below), whose sum is σ = 1444327560. Its totient is φ = 169537536.

The previous prime is 520874819. The next prime is 520874857. The reversal of 520874856 is 658478025.

520874856 is a `hidden beast` number, since 520 + 8 + 74 + 8 + 56 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 402804900 + 118069956 = 20070^2 + 10866^2 .

It is a super-2 number, since 2×520874856² = 542621231226041472, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (520874857) 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 23 ways as a sum of consecutive naturals, for example, 593490 + ... + 594366.

Almost surely, 2^520874856 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 520874856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (722163780).

520874856 is an abundant number, since it is smaller than the sum of its proper divisors (923452704).

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

520874856 is a wasteful number, since it uses less digits than its factorization.

520874856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1075 (or 1068 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The square root of 520874856 is about 22822.6829272984. The cubic root of 520874856 is about 804.5958677733.

The spelling of 520874856 in words is "five hundred twenty million, eight hundred seventy-four thousand, eight hundred fifty-six".