1818240322 has 4 divisors (see below), whose sum is σ = 2727360486. Its totient is φ = 909120160.

The previous prime is 1818240301. The next prime is 1818240329. The reversal of 1818240322 is 2230428181.

It is a happy number.

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., 1740641841 + 77598481 = 41721^2 + 8809^2 .

It is a Smith number, since the sum of its digits (31) 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 (1818240329) 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 as a sum of consecutive naturals, namely, 454560079 + ... + 454560082.

Almost surely, 2^1818240322 is an apocalyptic number.

1818240322 is a deficient number, since it is larger than the sum of its proper divisors (909120164).

1818240322 is an equidigital number, since it uses as much as digits as its factorization.

1818240322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909120163.

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 1818240322 is about 42640.8292836807. The cubic root of 1818240322 is about 1220.5355352875.

The spelling of 1818240322 in words is "one billion, eight hundred eighteen million, two hundred forty thousand, three hundred twenty-two".