6222540720 has 320 divisors, whose sum is σ = 21918597120. Its totient is φ = 1446681600.

The previous prime is 6222540703. The next prime is 6222540721. The reversal of 6222540720 is 270452226.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (6222540721) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11375487 + ... + 11376033.

It is an arithmetic number, because the mean of its divisors is an integer number (68495616).

Almost surely, 2^6222540720 is an apocalyptic number.

6222540720 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6222540720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10959298560).

6222540720 is an abundant number, since it is smaller than the sum of its proper divisors (15696056400).

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

6222540720 is a wasteful number, since it uses less digits than its factorization.

6222540720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744 (or 738 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 30.

The square root of 6222540720 is about 78883.0825969675. The cubic root of 6222540720 is about 1839.3141662622.

Adding to 6222540720 its reverse (270452226), we get a palindrome (6492992946).

The spelling of 6222540720 in words is "six billion, two hundred twenty-two million, five hundred forty thousand, seven hundred twenty".