19889828 has 12 divisors (see below), whose sum is σ = 39779712. Its totient is φ = 8524200.

The previous prime is 19889803. The next prime is 19889833. The reversal of 19889828 is 82898891.

19889828 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 19889828.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 355148 + ... + 355203.

It is an arithmetic number, because the mean of its divisors is an integer number (3314976).

Almost surely, 2^19889828 is an apocalyptic number.

It is an amenable number.

19889828 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

19889828 is a wasteful number, since it uses less digits than its factorization.

19889828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 710362 (or 710360 counting only the distinct ones).

The product of its digits is 663552, while the sum is 53.

The square root of 19889828 is about 4459.8013408671. The cubic root of 19889828 is about 270.9424222843.

The spelling of 19889828 in words is "nineteen million, eight hundred eighty-nine thousand, eight hundred twenty-eight".