1812818 has 16 divisors (see below), whose sum is σ = 3208704. Its totient is φ = 751680.

The previous prime is 1812817. The next prime is 1812821. The reversal of 1812818 is 8182181.

It is a super-2 number, since 2×1812818² = 6572618202248, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1812817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1655 + ... + 2522.

It is an arithmetic number, because the mean of its divisors is an integer number (200544).

2^1812818 is an apocalyptic number.

1812818 is a deficient number, since it is larger than the sum of its proper divisors (1395886).

1812818 is a wasteful number, since it uses less digits than its factorization.

1812818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4217.

The product of its digits is 1024, while the sum is 29.

The square root of 1812818 is about 1346.4092988390. The cubic root of 1812818 is about 121.9321041187.

Adding to 1812818 its reverse (8182181), we get a palindrome (9994999).

The spelling of 1812818 in words is "one million, eight hundred twelve thousand, eight hundred eighteen".