2138430444 has 24 divisors (see below), whose sum is σ = 4996336128. Its totient is φ = 711858000.

The previous prime is 2138430443. The next prime is 2138430517. The reversal of 2138430444 is 4440348312.

It is not an unprimeable number, because it can be changed into a prime (2138430443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109632 + ... + 127655.

It is an arithmetic number, because the mean of its divisors is an integer number (208180672).

Almost surely, 2^2138430444 is an apocalyptic number.

It is an amenable number.

2138430444 is an abundant number, since it is smaller than the sum of its proper divisors (2857905684).

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

2138430444 is a wasteful number, since it uses less digits than its factorization.

2138430444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238045 (or 238043 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 33.

The square root of 2138430444 is about 46243.1664573264. The cubic root of 2138430444 is about 1288.3436153222.

Adding to 2138430444 its reverse (4440348312), we get a palindrome (6578778756).

The spelling of 2138430444 in words is "two billion, one hundred thirty-eight million, four hundred thirty thousand, four hundred forty-four".