520271808 has 168 divisors, whose sum is σ = 1696010832. Its totient is φ = 139862016.

The previous prime is 520271783. The next prime is 520271809. The reversal of 520271808 is 808172025.

It is a tau number, because it is divible by the number of its divisors (168).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520271809) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 158310 + ... + 161562.

Almost surely, 2^520271808 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 520271808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (848005416).

520271808 is an abundant number, since it is smaller than the sum of its proper divisors (1175739024).

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

520271808 is a wasteful number, since it uses less digits than its factorization.

520271808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3299 (or 3282 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 33.

The square root of 520271808 is about 22809.4675080327. The cubic root of 520271808 is about 804.2852382647.

It can be divided in two parts, 52027 and 1808, that added together give a palindrome (53835).

The spelling of 520271808 in words is "five hundred twenty million, two hundred seventy-one thousand, eight hundred eight".