189046478 has 4 divisors (see below), whose sum is σ = 283569720. Its totient is φ = 94523238.

The previous prime is 189046469. The next prime is 189046489. The reversal of 189046478 is 874640981.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 874640981 = 67 ⋅13054343.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47261618 + ... + 47261621.

It is an arithmetic number, because the mean of its divisors is an integer number (70892430).

Almost surely, 2^189046478 is an apocalyptic number.

189046478 is a deficient number, since it is larger than the sum of its proper divisors (94523242).

189046478 is an equidigital number, since it uses as much as digits as its factorization.

189046478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94523241.

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 189046478 is about 13749.4173694742. The cubic root of 189046478 is about 573.9263928891.

The spelling of 189046478 in words is "one hundred eighty-nine million, forty-six thousand, four hundred seventy-eight".