520744434 has 64 divisors (see below), whose sum is σ = 1215160320. Its totient is φ = 145696320.

The previous prime is 520744409. The next prime is 520744439. The reversal of 520744434 is 434447025.

It is a junction number, because it is equal to n+sod(n) for n = 520744395 and 520744404.

It is not an unprimeable number, because it can be changed into a prime (520744439) 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, 1124487 + ... + 1124949.

It is an arithmetic number, because the mean of its divisors is an integer number (18986880).

Almost surely, 2^520744434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 520744434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (607580160).

520744434 is an abundant number, since it is smaller than the sum of its proper divisors (694415886).

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

520744434 is a wasteful number, since it uses less digits than its factorization.

520744434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975.

The product of its (nonzero) digits is 53760, while the sum is 33.

The square root of 520744434 is about 22819.8254594552. The cubic root of 520744434 is about 804.5287078399.

The spelling of 520744434 in words is "five hundred twenty million, seven hundred forty-four thousand, four hundred thirty-four".