1944169688 has 8 divisors (see below), whose sum is σ = 3645318180. Its totient is φ = 972084840.

The previous prime is 1944169687. The next prime is 1944169723. The reversal of 1944169688 is 8869614491.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1944169687) 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, 121510598 + ... + 121510613.

Almost surely, 2^1944169688 is an apocalyptic number.

It is an amenable number.

1944169688 is a deficient number, since it is larger than the sum of its proper divisors (1701148492).

1944169688 is a wasteful number, since it uses less digits than its factorization.

1944169688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243021217 (or 243021213 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 56.

The square root of 1944169688 is about 44092.7396291045. The cubic root of 1944169688 is about 1248.0866060734.

The spelling of 1944169688 in words is "one billion, nine hundred forty-four million, one hundred sixty-nine thousand, six hundred eighty-eight".