180389994 has 8 divisors (see below), whose sum is σ = 360780000. Its totient is φ = 60129996.

The previous prime is 180389983. The next prime is 180390053. The reversal of 180389994 is 499983081.

It is a happy number.

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

180389994 is an admirable number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15032494 + ... + 15032505.

It is an arithmetic number, because the mean of its divisors is an integer number (45097500).

Almost surely, 2^180389994 is an apocalyptic number.

180389994 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.

180389994 is a wasteful number, since it uses less digits than its factorization.

180389994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30065004.

The product of its (nonzero) digits is 559872, while the sum is 51.

The square root of 180389994 is about 13430.9342191822. The cubic root of 180389994 is about 565.0290991878.

The spelling of 180389994 in words is "one hundred eighty million, three hundred eighty-nine thousand, nine hundred ninety-four".