189428 has 24 divisors (see below), whose sum is σ = 362880. Its totient is φ = 86240.

The previous prime is 189421. The next prime is 189433. The reversal of 189428 is 824981.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 189394 and 189403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2633 + ... + 2703.

It is an arithmetic number, because the mean of its divisors is an integer number (15120).

2¹⁸⁹⁴²⁸ is an apocalyptic number.

It is an amenable number.

189428 is a deficient number, since it is larger than the sum of its proper divisors (173452).

189428 is a wasteful number, since it uses less digits than its factorization.

189428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127 (or 125 counting only the distinct ones).

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

The square root of 189428 is about 435.2332707871. The cubic root of 189428 is about 57.4312221128.

The spelling of 189428 in words is "one hundred eighty-nine thousand, four hundred twenty-eight".