19889328 has 20 divisors (see below), whose sum is σ = 51380888. Its totient is φ = 6629760.

The previous prime is 19889327. The next prime is 19889329. The reversal of 19889328 is 82398891.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (19889327) and next prime (19889329).

It is a Harshad number since it is a multiple of its sum of digits (48), and also a Moran number because the ratio is a prime number: 414361 = 19889328 / (1 + 9 + 8 + 8 + 9 + 3 + 2 + 8).

It is not an unprimeable number, because it can be changed into a prime (19889323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 207133 + ... + 207228.

Almost surely, 2^19889328 is an apocalyptic number.

It is an amenable number.

19889328 is an abundant number, since it is smaller than the sum of its proper divisors (31491560).

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

19889328 is a wasteful number, since it uses less digits than its factorization.

19889328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414372 (or 414366 counting only the distinct ones).

The product of its digits is 248832, while the sum is 48.

The square root of 19889328 is about 4459.7452842063. The cubic root of 19889328 is about 270.9401519052.

The spelling of 19889328 in words is "nineteen million, eight hundred eighty-nine thousand, three hundred twenty-eight".