189541218 has 16 divisors (see below), whose sum is σ = 382764096. Its totient is φ = 62566800.

The previous prime is 189541199. The next prime is 189541267. The reversal of 189541218 is 812145981.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152733 + ... + 153968.

It is an arithmetic number, because the mean of its divisors is an integer number (23922756).

Almost surely, 2^189541218 is an apocalyptic number.

189541218 is an abundant number, since it is smaller than the sum of its proper divisors (193222878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

189541218 is a wasteful number, since it uses less digits than its factorization.

189541218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306809.

The product of its digits is 23040, while the sum is 39.

The square root of 189541218 is about 13767.3969217133. The cubic root of 189541218 is about 574.4266173301.

The spelling of 189541218 in words is "one hundred eighty-nine million, five hundred forty-one thousand, two hundred eighteen".