16128189 has 72 divisors (see below), whose sum is σ = 31606848. Its totient is φ = 7672320.

The previous prime is 16128157. The next prime is 16128197. The reversal of 16128189 is 98182161.

It is not a de Polignac number, because 16128189 - 2⁵ = 16128157 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16128389) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 435879 + ... + 435915.

It is an arithmetic number, because the mean of its divisors is an integer number (438984).

Almost surely, 2^16128189 is an apocalyptic number.

It is an amenable number.

16128189 is a deficient number, since it is larger than the sum of its proper divisors (15478659).

16128189 is a wasteful number, since it uses less digits than its factorization.

16128189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115 (or 75 counting only the distinct ones).

The product of its digits is 6912, while the sum is 36.

The square root of 16128189 is about 4015.9916583579. The cubic root of 16128189 is about 252.6553708336.

It can be divided in two parts, 1612 and 8189, that added together give a square (9801 = 99²).

The spelling of 16128189 in words is "sixteen million, one hundred twenty-eight thousand, one hundred eighty-nine".