1818194 has 12 divisors (see below), whose sum is σ = 3172734. Its totient is φ = 779184.

The previous prime is 1818163. The next prime is 1818199. The reversal of 1818194 is 4918181.

It can be written as a sum of positive squares in only one way, i.e., 1787569 + 30625 = 1337^2 + 175^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1818194.

It is not an unprimeable number, because it can be changed into a prime (1818199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9179 + ... + 9374.

2^1818194 is an apocalyptic number.

1818194 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1818194 is a deficient number, since it is larger than the sum of its proper divisors (1354540).

1818194 is a wasteful number, since it uses less digits than its factorization.

1818194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18569 (or 18562 counting only the distinct ones).

The product of its digits is 2304, while the sum is 32.

The square root of 1818194 is about 1348.4042420580. The cubic root of 1818194 is about 122.0525170298.

The spelling of 1818194 in words is "one million, eight hundred eighteen thousand, one hundred ninety-four".