19889000 has 32 divisors (see below), whose sum is σ = 46542600. Its totient is φ = 7955200.

The previous prime is 19888969. The next prime is 19889027. The reversal of 19889000 is 98891.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 11115556 + 8773444 = 3334^2 + 2962^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8945 + ... + 10944.

Almost surely, 2^19889000 is an apocalyptic number.

19889000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19889000 is an abundant number, since it is smaller than the sum of its proper divisors (26653600).

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

19889000 is a wasteful number, since it uses less digits than its factorization.

19889000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19910 (or 19896 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 35.

The square root of 19889000 is about 4459.7085106540. The cubic root of 19889000 is about 270.9386625159.

It can be divided in two parts, 198 and 89000, that added together give a palindrome (89198).

The spelling of 19889000 in words is "nineteen million, eight hundred eighty-nine thousand".