3220443240 has 128 divisors (see below), whose sum is σ = 11250005760. Its totient is φ = 722202624.

The previous prime is 3220443221. The next prime is 3220443241. The reversal of 3220443240 is 423440223.

3220443240 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 3220443240.

It is not an unprimeable number, because it can be changed into a prime (3220443241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8352 + ... + 80688.

It is an arithmetic number, because the mean of its divisors is an integer number (87890670).

Almost surely, 2^3220443240 is an apocalyptic number.

3220443240 is a gapful number since it is divisible by the number (30) 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 3220443240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5625002880).

3220443240 is an abundant number, since it is smaller than the sum of its proper divisors (8029562520).

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

3220443240 is a wasteful number, since it uses less digits than its factorization.

3220443240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72411 (or 72407 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 3220443240 is about 56748.9492413736. The cubic root of 3220443240 is about 1476.7440047229.

Adding to 3220443240 its reverse (423440223), we get a palindrome (3643883463).

The spelling of 3220443240 in words is "three billion, two hundred twenty million, four hundred forty-three thousand, two hundred forty".