2120438444 has 6 divisors (see below), whose sum is σ = 3710767284. Its totient is φ = 1060219220.

The previous prime is 2120438431. The next prime is 2120438449. The reversal of 2120438444 is 4448340212.

It is a super-2 number, since 2×2120438444² = 8992518389586282272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2120438444.

It is not an unprimeable number, because it can be changed into a prime (2120438449) 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 as a sum of consecutive naturals, namely, 265054802 + ... + 265054809.

It is an arithmetic number, because the mean of its divisors is an integer number (618461214).

Almost surely, 2^2120438444 is an apocalyptic number.

It is an amenable number.

2120438444 is a deficient number, since it is larger than the sum of its proper divisors (1590328840).

2120438444 is a wasteful number, since it uses less digits than its factorization.

2120438444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 530109615 (or 530109613 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 32.

The square root of 2120438444 is about 46048.2186843313. The cubic root of 2120438444 is about 1284.7202112060.

Adding to 2120438444 its reverse (4448340212), we get a palindrome (6568778656).

The spelling of 2120438444 in words is "two billion, one hundred twenty million, four hundred thirty-eight thousand, four hundred forty-four".