1916889108 has 12 divisors (see below), whose sum is σ = 4472741280. Its totient is φ = 638963032.

The previous prime is 1916889097. The next prime is 1916889127. The reversal of 1916889108 is 8019886191.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79870368 + ... + 79870391.

It is an arithmetic number, because the mean of its divisors is an integer number (372728440).

Almost surely, 2^1916889108 is an apocalyptic number.

It is an amenable number.

1916889108 is an abundant number, since it is smaller than the sum of its proper divisors (2555852172).

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

1916889108 is a wasteful number, since it uses less digits than its factorization.

1916889108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159740766 (or 159740764 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 51.

The square root of 1916889108 is about 43782.2921738915. The cubic root of 1916889108 is about 1242.2213711275.

The spelling of 1916889108 in words is "one billion, nine hundred sixteen million, eight hundred eighty-nine thousand, one hundred eight".