520244240 has 40 divisors (see below), whose sum is σ = 1210522968. Its totient is φ = 207933440.

The previous prime is 520244239. The next prime is 520244297. The reversal of 520244240 is 42442025.

It can be written as a sum of positive squares in 4 ways, for example, as 154057744 + 366186496 = 12412^2 + 19136^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180410 + ... + 183270.

Almost surely, 2^520244240 is an apocalyptic number.

It is an amenable number.

520244240 is an abundant number, since it is smaller than the sum of its proper divisors (690278728).

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

520244240 is a wasteful number, since it uses less digits than its factorization.

520244240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5147 (or 5141 counting only the distinct ones).

The product of its (nonzero) digits is 2560, while the sum is 23.

The square root of 520244240 is about 22808.8631895586. The cubic root of 520244240 is about 804.2710322755.

Adding to 520244240 its reverse (42442025), we get a palindrome (562686265).

The spelling of 520244240 in words is "five hundred twenty million, two hundred forty-four thousand, two hundred forty".