2220443540 has 48 divisors (see below), whose sum is σ = 5352412800. Its totient is φ = 757959552.

The previous prime is 2220443521. The next prime is 2220443543. The reversal of 2220443540 is 453440222.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2220443543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2570 + ... + 66689.

It is an arithmetic number, because the mean of its divisors is an integer number (111508600).

Almost surely, 2^2220443540 is an apocalyptic number.

2220443540 is a gapful number since it is divisible by the number (20) 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 2220443540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2676206400).

2220443540 is an abundant number, since it is smaller than the sum of its proper divisors (3131969260).

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

2220443540 is a wasteful number, since it uses less digits than its factorization.

2220443540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69504 (or 69502 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 2220443540 is about 47121.5825286036. The cubic root of 2220443540 is about 1304.6076221832.

Adding to 2220443540 its reverse (453440222), we get a palindrome (2673883762).

The spelling of 2220443540 in words is "two billion, two hundred twenty million, four hundred forty-three thousand, five hundred forty".