1428189 has 16 divisors (see below), whose sum is σ = 2224128. Its totient is φ = 798192.

The previous prime is 1428179. The next prime is 1428197. The reversal of 1428189 is 9818241.

It is not a de Polignac number, because 1428189 - 2⁵ = 1428157 is a prime.

It is a super-3 number, since 3×1428189³ = 8739333367090545807, which contains 333 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264 + ... + 1710.

It is an arithmetic number, because the mean of its divisors is an integer number (139008).

2^1428189 is an apocalyptic number.

It is an amenable number.

1428189 is a deficient number, since it is larger than the sum of its proper divisors (795939).

1428189 is a wasteful number, since it uses less digits than its factorization.

1428189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504.

The product of its digits is 4608, while the sum is 33.

The square root of 1428189 is about 1195.0686172768. The cubic root of 1428189 is about 112.6147372622.

It can be divided in two parts, 14 and 28189, that added together give a triangular number (28203 = T₂₃₇).

The spelling of 1428189 in words is "one million, four hundred twenty-eight thousand, one hundred eighty-nine".