520144434 has 12 divisors (see below), whose sum is σ = 1126979646. Its totient is φ = 173381472.

The previous prime is 520144433. The next prime is 520144439. The reversal of 520144434 is 434441025.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 308529225 + 211615209 = 17565^2 + 14547^2 .

It is a junction number, because it is equal to n+sod(n) for n = 520144398 and 520144407.

It is not an unprimeable number, because it can be changed into a prime (520144433) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14448439 + ... + 14448474.

Almost surely, 2^520144434 is an apocalyptic number.

520144434 is an abundant number, since it is smaller than the sum of its proper divisors (606835212).

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

520144434 is a wasteful number, since it uses less digits than its factorization.

520144434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28896921 (or 28896918 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 520144434 is about 22806.6752070529. The cubic root of 520144434 is about 804.2195973262.

Adding to 520144434 its reverse (434441025), we get a palindrome (954585459).

The spelling of 520144434 in words is "five hundred twenty million, one hundred forty-four thousand, four hundred thirty-four".