1840218 has 8 divisors (see below), whose sum is σ = 3680448. Its totient is φ = 613404.

The previous prime is 1840183. The next prime is 1840219. The reversal of 1840218 is 8120481.

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

1840218 is an admirable number.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (1840219) 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, 153346 + ... + 153357.

It is an arithmetic number, because the mean of its divisors is an integer number (460056).

2^1840218 is an apocalyptic number.

1840218 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.

1840218 is a wasteful number, since it uses less digits than its factorization.

1840218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306708.

The product of its (nonzero) digits is 512, while the sum is 24.

The square root of 1840218 is about 1356.5463501112. The cubic root of 1840218 is about 122.5433526968.

Adding to 1840218 its reverse (8120481), we get a palindrome (9960699).

The spelling of 1840218 in words is "one million, eight hundred forty thousand, two hundred eighteen".