5220400240 has 80 divisors (see below), whose sum is σ = 13465388160. Its totient is φ = 1866133760.

The previous prime is 5220400219. The next prime is 5220400243. The reversal of 5220400240 is 420040225.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5220400243) 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 15 ways as a sum of consecutive naturals, for example, 1647 + ... + 102193.

It is an arithmetic number, because the mean of its divisors is an integer number (168317352).

Almost surely, 2^5220400240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5220400240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6732694080).

5220400240 is an abundant number, since it is smaller than the sum of its proper divisors (8244987920).

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

5220400240 is a wasteful number, since it uses less digits than its factorization.

5220400240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100630 (or 100624 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 5220400240 is about 72252.3372632332. The cubic root of 5220400240 is about 1734.7408294951.

Adding to 5220400240 its reverse (420040225), we get a palindrome (5640440465).

The spelling of 5220400240 in words is "five billion, two hundred twenty million, four hundred thousand, two hundred forty".