5208240420 has 36 divisors (see below), whose sum is σ = 15798329820. Its totient is φ = 1388864064.

The previous prime is 5208240391. The next prime is 5208240421. The reversal of 5208240420 is 240428025.

It is a happy number.

5208240420 is a `hidden beast` number, since 520 + 82 + 40 + 4 + 20 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 2415329316 + 2792911104 = 49146^2 + 52848^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (5208240421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14467155 + ... + 14467514.

It is an arithmetic number, because the mean of its divisors is an integer number (438842495).

Almost surely, 2^5208240420 is an apocalyptic number.

It is an amenable number.

5208240420 is an abundant number, since it is smaller than the sum of its proper divisors (10590089400).

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

5208240420 is a wasteful number, since it uses less digits than its factorization.

5208240420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28934684 (or 28934679 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 5208240420 is about 72168.1399233762. The cubic root of 5208240420 is about 1733.3928782141.

Adding to 5208240420 its reverse (240428025), we get a palindrome (5448668445).

The spelling of 5208240420 in words is "five billion, two hundred eight million, two hundred forty thousand, four hundred twenty".