520406128 has 40 divisors (see below), whose sum is σ = 1118004336. Its totient is φ = 232665600.

The previous prime is 520406113. The next prime is 520406129. The reversal of 520406128 is 821604025.

It is a junction number, because it is equal to n+sod(n) for n = 520406096 and 520406105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520406129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13501 + ... + 34972.

Almost surely, 2^520406128 is an apocalyptic number.

It is an amenable number.

520406128 is an abundant number, since it is smaller than the sum of its proper divisors (597598208).

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

520406128 is a wasteful number, since it uses less digits than its factorization.

520406128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48553 (or 48547 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 520406128 is about 22812.4117094182. The cubic root of 520406128 is about 804.3544471513.

The spelling of 520406128 in words is "five hundred twenty million, four hundred six thousand, one hundred twenty-eight".