449181218 has 4 divisors (see below), whose sum is σ = 673771830. Its totient is φ = 224590608.

The previous prime is 449181193. The next prime is 449181253. The reversal of 449181218 is 812181944.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 431683729 + 17497489 = 20777^2 + 4183^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112295303 + ... + 112295306.

Almost surely, 2^449181218 is an apocalyptic number.

449181218 is a deficient number, since it is larger than the sum of its proper divisors (224590612).

449181218 is a wasteful number, since it uses less digits than its factorization.

449181218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224590611.

The product of its digits is 18432, while the sum is 38.

The square root of 449181218 is about 21193.8957721321. The cubic root of 449181218 is about 765.8443795783.

The spelling of 449181218 in words is "four hundred forty-nine million, one hundred eighty-one thousand, two hundred eighteen".