16428189 has 8 divisors (see below), whose sum is σ = 21940992. Its totient is φ = 10933760.

The previous prime is 16428173. The next prime is 16428197. The reversal of 16428189 is 98182461.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 16428189 - 2⁴ = 16428173 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 (16428119) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2349 + ... + 6194.

It is an arithmetic number, because the mean of its divisors is an integer number (2742624).

Almost surely, 2^16428189 is an apocalyptic number.

It is an amenable number.

16428189 is a deficient number, since it is larger than the sum of its proper divisors (5512803).

16428189 is an equidigital number, since it uses as much as digits as its factorization.

16428189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9187.

The product of its digits is 27648, while the sum is 39.

The square root of 16428189 is about 4053.1702406881. The cubic root of 16428189 is about 254.2123020927.

The spelling of 16428189 in words is "sixteen million, four hundred twenty-eight thousand, one hundred eighty-nine".