2189844235838 has 16 divisors (see below), whose sum is σ = 3974843319264. Its totient is φ = 883298515200.

The previous prime is 2189844235819. The next prime is 2189844235841. The reversal of 2189844235838 is 8385324489812.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4600512863 + ... + 4600513338.

It is an arithmetic number, because the mean of its divisors is an integer number (248427707454).

Almost surely, 2^{2189844235838} is an apocalyptic number.

2189844235838 is a deficient number, since it is larger than the sum of its proper divisors (1784999083426).

2189844235838 is a wasteful number, since it uses less digits than its factorization.

2189844235838 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9201026227.

The product of its digits is 106168320, while the sum is 65.

The spelling of 2189844235838 in words is "two trillion, one hundred eighty-nine billion, eight hundred forty-four million, two hundred thirty-five thousand, eight hundred thirty-eight".