189089994 has 8 divisors (see below), whose sum is σ = 378180000. Its totient is φ = 63029996.

The previous prime is 189089993. The next prime is 189090007. The reversal of 189089994 is 499980981.

It is a happy number.

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

189089994 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (189089993) 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, 15757494 + ... + 15757505.

It is an arithmetic number, because the mean of its divisors is an integer number (47272500).

Almost surely, 2^189089994 is an apocalyptic number.

189089994 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.

189089994 is a wasteful number, since it uses less digits than its factorization.

189089994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31515004.

The product of its (nonzero) digits is 1679616, while the sum is 57.

The square root of 189089994 is about 13750.9997454731. Note that the first 3 decimals coincide. The cubic root of 189089994 is about 573.9704262667.

The spelling of 189089994 in words is "one hundred eighty-nine million, eighty-nine thousand, nine hundred ninety-four".