520531028 has 12 divisors (see below), whose sum is σ = 913159380. Its totient is φ = 259628352.

The previous prime is 520531027. The next prime is 520531093. The reversal of 520531028 is 820135025.

It can be written as a sum of positive squares in 2 ways, for example, as 307020484 + 213510544 = 17522^2 + 14612^2 .

It is a super-2 number, since 2×520531028² = 541905102221473568, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 520530988 and 520531006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520531021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 157451 + ... + 160722.

It is an arithmetic number, because the mean of its divisors is an integer number (76096615).

Almost surely, 2^520531028 is an apocalyptic number.

It is an amenable number.

520531028 is a deficient number, since it is larger than the sum of its proper divisors (392628352).

520531028 is a wasteful number, since it uses less digits than its factorization.

520531028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318586 (or 318584 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 520531028 is about 22815.1490900235. The cubic root of 520531028 is about 804.4187916628.

The spelling of 520531028 in words is "five hundred twenty million, five hundred thirty-one thousand, twenty-eight".