1891110196 has 12 divisors (see below), whose sum is σ = 3312225252. Its totient is φ = 944760128.

The previous prime is 1891110173. The next prime is 1891110197. The reversal of 1891110196 is 6910111981.

It can be written as a sum of positive squares in 2 ways, for example, as 1390245796 + 500864400 = 37286^2 + 22380^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1891110197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 193375 + ... + 202918.

It is an arithmetic number, because the mean of its divisors is an integer number (276018771).

Almost surely, 2^1891110196 is an apocalyptic number.

It is an amenable number.

1891110196 is a deficient number, since it is larger than the sum of its proper divisors (1421115056).

1891110196 is a wasteful number, since it uses less digits than its factorization.

1891110196 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397490 (or 397488 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 37.

The square root of 1891110196 is about 43486.8968311145. The cubic root of 1891110196 is about 1236.6276290362.

The spelling of 1891110196 in words is "one billion, eight hundred ninety-one million, one hundred ten thousand, one hundred ninety-six".