19889416 has 32 divisors (see below), whose sum is σ = 38669400. Its totient is φ = 9584640.

The previous prime is 19889407. The next prime is 19889417. The reversal of 19889416 is 61498891.

It can be written as a sum of positive squares in 4 ways, for example, as 12888100 + 7001316 = 3590^2 + 2646^2 .

It is not an unprimeable number, because it can be changed into a prime (19889417) 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 7 ways as a sum of consecutive naturals, for example, 25480 + ... + 26248.

Almost surely, 2^19889416 is an apocalyptic number.

It is an amenable number.

19889416 is a deficient number, since it is larger than the sum of its proper divisors (18779984).

19889416 is a wasteful number, since it uses less digits than its factorization.

19889416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 889 (or 885 counting only the distinct ones).

The product of its digits is 124416, while the sum is 46.

The square root of 19889416 is about 4459.7551502297. The cubic root of 19889416 is about 270.9405514947.

The spelling of 19889416 in words is "nineteen million, eight hundred eighty-nine thousand, four hundred sixteen".