1944117189 has 18 divisors (see below), whose sum is σ = 3266646630. Its totient is φ = 1110923856.

The previous prime is 1944117179. The next prime is 1944117191. The reversal of 1944117189 is 9817114491.

1944117189 is a `hidden beast` number, since 1 + 94 + 411 + 71 + 89 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1271492964 + 672624225 = 35658^2 + 25935^2 .

It is not a de Polignac number, because 1944117189 - 2⁴ = 1944117173 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944117179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2203774 + ... + 2204655.

Almost surely, 2^1944117189 is an apocalyptic number.

It is an amenable number.

1944117189 is a deficient number, since it is larger than the sum of its proper divisors (1322529441).

1944117189 is a wasteful number, since it uses less digits than its factorization.

1944117189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4408449 (or 4408439 counting only the distinct ones).

The product of its digits is 72576, while the sum is 45.

The square root of 1944117189 is about 44092.1443003173. The cubic root of 1944117189 is about 1248.0753718193.

The spelling of 1944117189 in words is "one billion, nine hundred forty-four million, one hundred seventeen thousand, one hundred eighty-nine".