189427818 has 8 divisors (see below), whose sum is σ = 378855648. Its totient is φ = 63142604.

The previous prime is 189427817. The next prime is 189427837. The reversal of 189427818 is 818724981.

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

189427818 is an admirable number.

It is a super-2 number, since 2×189427818² = 71765796464482248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (189427817) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 15785646 + ... + 15785657.

It is an arithmetic number, because the mean of its divisors is an integer number (47356956).

Almost surely, 2^189427818 is an apocalyptic number.

189427818 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

189427818 is a wasteful number, since it uses less digits than its factorization.

189427818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31571308.

The product of its digits is 258048, while the sum is 48.

The square root of 189427818 is about 13763.2778799238. The cubic root of 189427818 is about 574.3120371977.

The spelling of 189427818 in words is "one hundred eighty-nine million, four hundred twenty-seven thousand, eight hundred eighteen".