189404216 has 8 divisors (see below), whose sum is σ = 355132920. Its totient is φ = 94702104.

The previous prime is 189404213. The next prime is 189404227. The reversal of 189404216 is 612404981.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189404213) 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 as a sum of consecutive naturals, namely, 11837756 + ... + 11837771.

It is an arithmetic number, because the mean of its divisors is an integer number (44391615).

Almost surely, 2^189404216 is an apocalyptic number.

It is an amenable number.

189404216 is a deficient number, since it is larger than the sum of its proper divisors (165728704).

189404216 is a wasteful number, since it uses less digits than its factorization.

189404216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23675533 (or 23675529 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 189404216 is about 13762.4204266546. The cubic root of 189404216 is about 574.2881838274.

The spelling of 189404216 in words is "one hundred eighty-nine million, four hundred four thousand, two hundred sixteen".