189730418 has 8 divisors (see below), whose sum is σ = 286408812. Its totient is φ = 94260816.

The previous prime is 189730417. The next prime is 189730433. The reversal of 189730418 is 814037981.

It can be written as a sum of positive squares in 2 ways, for example, as 189420169 + 310249 = 13763^2 + 557^2 .

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

It is not an unprimeable number, because it can be changed into a prime (189730417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301805 + ... + 302432.

Almost surely, 2^189730418 is an apocalyptic number.

189730418 is a deficient number, since it is larger than the sum of its proper divisors (96678394).

189730418 is a wasteful number, since it uses less digits than its factorization.

189730418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604396.

The product of its (nonzero) digits is 48384, while the sum is 41.

The square root of 189730418 is about 13774.2665140471. The cubic root of 189730418 is about 574.6176846086.

The spelling of 189730418 in words is "one hundred eighty-nine million, seven hundred thirty thousand, four hundred eighteen".