1896978168 has 24 divisors (see below), whose sum is σ = 5137649400. Its totient is φ = 632326032.

The previous prime is 1896978163. The next prime is 1896978191. The reversal of 1896978168 is 8618796981.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1896978163) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13173388 + ... + 13173531.

It is an arithmetic number, because the mean of its divisors is an integer number (214068725).

Almost surely, 2^1896978168 is an apocalyptic number.

1896978168 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1896978168 is an abundant number, since it is smaller than the sum of its proper divisors (3240671232).

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

1896978168 is a wasteful number, since it uses less digits than its factorization.

1896978168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26346931 (or 26346924 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 63.

The square root of 1896978168 is about 43554.3128518864. The cubic root of 1896978168 is about 1237.9053623971.

The spelling of 1896978168 in words is "one billion, eight hundred ninety-six million, nine hundred seventy-eight thousand, one hundred sixty-eight".