520255872 has 240 divisors, whose sum is σ = 1645805700. Its totient is φ = 163109376.

The previous prime is 520255867. The next prime is 520255877. The reversal of 520255872 is 278552025.

520255872 is a `hidden beast` number, since 52 + 0 + 25 + 587 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (520255867) and next prime (520255877).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520255877) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 3742779 + ... + 3742917.

Almost surely, 2^520255872 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 520255872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (822902850).

520255872 is an abundant number, since it is smaller than the sum of its proper divisors (1125549828).

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

520255872 is a wasteful number, since it uses less digits than its factorization.

520255872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 56000, while the sum is 36.

The square root of 520255872 is about 22809.1181767292. The cubic root of 520255872 is about 804.2770263902.

The spelling of 520255872 in words is "five hundred twenty million, two hundred fifty-five thousand, eight hundred seventy-two".