1813218 has 32 divisors (see below), whose sum is σ = 4015872. Its totient is φ = 541200.

The previous prime is 1813211. The next prime is 1813219. The reversal of 1813218 is 8123181.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1813211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5313 + ... + 5643.

It is an arithmetic number, because the mean of its divisors is an integer number (125496).

2^1813218 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1813218, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2007936).

1813218 is an abundant number, since it is smaller than the sum of its proper divisors (2202654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1813218 is a wasteful number, since it uses less digits than its factorization.

1813218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 430.

The product of its digits is 384, while the sum is 24.

The square root of 1813218 is about 1346.5578338861. The cubic root of 1813218 is about 121.9410716037.

Adding to 1813218 its reverse (8123181), we get a palindrome (9936399).

The spelling of 1813218 in words is "one million, eight hundred thirteen thousand, two hundred eighteen".