520805428 has 96 divisors (see below), whose sum is σ = 1137709440. Its totient is φ = 205079040.

The previous prime is 520805423. The next prime is 520805429. The reversal of 520805428 is 824508025.

It is a junction number, because it is equal to n+sod(n) for n = 520805393 and 520805402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (520805423) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1880026 + ... + 1880302.

It is an arithmetic number, because the mean of its divisors is an integer number (11851140).

Almost surely, 2^520805428 is an apocalyptic number.

It is an amenable number.

520805428 is an abundant number, since it is smaller than the sum of its proper divisors (616904012).

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

520805428 is a wasteful number, since it uses less digits than its factorization.

520805428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 495 counting only the distinct ones).

The product of its (nonzero) digits is 25600, while the sum is 34.

The square root of 520805428 is about 22821.1618459709. The cubic root of 520805428 is about 804.5601176864.

The spelling of 520805428 in words is "five hundred twenty million, eight hundred five thousand, four hundred twenty-eight".