189043906 has 8 divisors (see below), whose sum is σ = 288372240. Its totient is φ = 92919828.

The previous prime is 189043891. The next prime is 189043963. The reversal of 189043906 is 609340981.

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

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 800916 + ... + 801151.

It is an arithmetic number, because the mean of its divisors is an integer number (36046530).

Almost surely, 2^189043906 is an apocalyptic number.

189043906 is a deficient number, since it is larger than the sum of its proper divisors (99328334).

189043906 is a wasteful number, since it uses less digits than its factorization.

189043906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602128.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 189043906 is about 13749.3238379202. The cubic root of 189043906 is about 573.9237900982.

It can be divided in two parts, 1890 and 43906, that added together give a square (45796 = 214²).

The spelling of 189043906 in words is "one hundred eighty-nine million, forty-three thousand, nine hundred six".