1894190868 has 36 divisors (see below), whose sum is σ = 4800070548. Its totient is φ = 629817600.

The previous prime is 1894190819. The next prime is 1894190897. The reversal of 1894190868 is 8680914981.

It can be written as a sum of positive squares in 2 ways, for example, as 1880263044 + 13927824 = 43362^2 + 3732^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51171 + ... + 80042.

It is an arithmetic number, because the mean of its divisors is an integer number (133335293).

Almost surely, 2^1894190868 is an apocalyptic number.

1894190868 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1894190868 is an abundant number, since it is smaller than the sum of its proper divisors (2905879680).

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

1894190868 is a wasteful number, since it uses less digits than its factorization.

1894190868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131624 (or 131619 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 54.

The square root of 1894190868 is about 43522.3031100148. The cubic root of 1894190868 is about 1237.2987651968.

The spelling of 1894190868 in words is "one billion, eight hundred ninety-four million, one hundred ninety thousand, eight hundred sixty-eight".