189478 has 8 divisors (see below), whose sum is σ = 286200. Its totient is φ = 94080.

The previous prime is 189473. The next prime is 189479. The reversal of 189478 is 874981.

189478 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189473) 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, 198 + ... + 646.

It is an arithmetic number, because the mean of its divisors is an integer number (35775).

2¹⁸⁹⁴⁷⁸ is an apocalyptic number.

189478 is a deficient number, since it is larger than the sum of its proper divisors (96722).

189478 is a wasteful number, since it uses less digits than its factorization.

189478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 662.

The product of its digits is 16128, while the sum is 37.

The square root of 189478 is about 435.2907074588. The cubic root of 189478 is about 57.4362747071.

The spelling of 189478 in words is "one hundred eighty-nine thousand, four hundred seventy-eight".