18049238 has 8 divisors (see below), whose sum is σ = 27103440. Its totient is φ = 9014760.

The previous prime is 18049237. The next prime is 18049247. The reversal of 18049238 is 83294081.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 18049198 and 18049207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18049231) 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, 2378 + ... + 6461.

It is an arithmetic number, because the mean of its divisors is an integer number (3387930).

Almost surely, 2^18049238 is an apocalyptic number.

18049238 is a deficient number, since it is larger than the sum of its proper divisors (9054202).

18049238 is a wasteful number, since it uses less digits than its factorization.

18049238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9862.

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 18049238 is about 4248.4394782084. The cubic root of 18049238 is about 262.3128849442.

The spelling of 18049238 in words is "eighteen million, forty-nine thousand, two hundred thirty-eight".