189659218 has 16 divisors (see below), whose sum is σ = 325543104. Its totient is φ = 81179280.

The previous prime is 189659213. The next prime is 189659231. The reversal of 189659218 is 812956981.

It is not an unprimeable number, because it can be changed into a prime (189659213) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3388 + ... + 19768.

It is an arithmetic number, because the mean of its divisors is an integer number (20346444).

Almost surely, 2^189659218 is an apocalyptic number.

189659218 is a deficient number, since it is larger than the sum of its proper divisors (135883886).

189659218 is a wasteful number, since it uses less digits than its factorization.

189659218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17217.

The product of its digits is 311040, while the sum is 49.

The square root of 189659218 is about 13771.6817418934. The cubic root of 189659218 is about 574.5457968245.

The spelling of 189659218 in words is "one hundred eighty-nine million, six hundred fifty-nine thousand, two hundred eighteen".