428189 has 4 divisors (see below), whose sum is σ = 429756. Its totient is φ = 426624.

The previous prime is 428177. The next prime is 428221. The reversal of 428189 is 981824.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 80089 + 348100 = 283^2 + 590^2 .

It is a cyclic number.

It is not a de Polignac number, because 428189 - 2⁴ = 428173 is a prime.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 428189.

It is not an unprimeable number, because it can be changed into a prime (428149) 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, 254 + ... + 959.

It is an arithmetic number, because the mean of its divisors is an integer number (107439).

2⁴²⁸¹⁸⁹ is an apocalyptic number.

It is an amenable number.

428189 is a deficient number, since it is larger than the sum of its proper divisors (1567).

428189 is a wasteful number, since it uses less digits than its factorization.

428189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1566.

The product of its digits is 4608, while the sum is 32.

The square root of 428189 is about 654.3615208736. The cubic root of 428189 is about 75.3723116914.

The spelling of 428189 in words is "four hundred twenty-eight thousand, one hundred eighty-nine".