189446 has 4 divisors (see below), whose sum is σ = 284172. Its totient is φ = 94722.

The previous prime is 189439. The next prime is 189463. The reversal of 189446 is 644981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 644981 = 47 ⋅13723.

It is an Ulam number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

189446 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47360 + ... + 47363.

It is an arithmetic number, because the mean of its divisors is an integer number (71043).

2¹⁸⁹⁴⁴⁶ is an apocalyptic number.

189446 is a deficient number, since it is larger than the sum of its proper divisors (94726).

189446 is an equidigital number, since it uses as much as digits as its factorization.

189446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94725.

The product of its digits is 6912, while the sum is 32.

The square root of 189446 is about 435.2539488620. The cubic root of 189446 is about 57.4330411492.

Subtracting 189446 from its reverse (644981), we obtain a triangular number (455535 = T₉₅₄).

The spelling of 189446 in words is "one hundred eighty-nine thousand, four hundred forty-six".