4389218944 has 64 divisors (see below), whose sum is σ = 9567175680. Its totient is φ = 1989222400.

The previous prime is 4389218929. The next prime is 4389218947. The reversal of 4389218944 is 4498129834.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 4389218891 and 4389218900.

It is not an unprimeable number, because it can be changed into a prime (4389218947) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 492609 + ... + 501439.

It is an arithmetic number, because the mean of its divisors is an integer number (149487120).

Almost surely, 2^4389218944 is an apocalyptic number.

4389218944 is a gapful number since it is divisible by the number (44) 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 4389218944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4783587840).

4389218944 is an abundant number, since it is smaller than the sum of its proper divisors (5177956736).

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

4389218944 is a wasteful number, since it uses less digits than its factorization.

4389218944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9209 (or 9197 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 52.

The square root of 4389218944 is about 66251.1806989128. The cubic root of 4389218944 is about 1637.3030907798.

The spelling of 4389218944 in words is "four billion, three hundred eighty-nine million, two hundred eighteen thousand, nine hundred forty-four".