1818379394 has 8 divisors (see below), whose sum is σ = 2937382140. Its totient is φ = 839252016.

The previous prime is 1818379391. The next prime is 1818379403. The reversal of 1818379394 is 4939738181.

It can be written as a sum of positive squares in 2 ways, for example, as 1815186025 + 3193369 = 42605^2 + 1787^2 .

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

It is not an unprimeable number, because it can be changed into a prime (1818379391) 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 3 ways as a sum of consecutive naturals, for example, 34968809 + ... + 34968860.

Almost surely, 2^1818379394 is an apocalyptic number.

1818379394 is a deficient number, since it is larger than the sum of its proper divisors (1119002746).

1818379394 is a wasteful number, since it uses less digits than its factorization.

1818379394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69937684.

The product of its digits is 1306368, while the sum is 53.

The square root of 1818379394 is about 42642.4599900146. The cubic root of 1818379394 is about 1220.5666529178.

The spelling of 1818379394 in words is "one billion, eight hundred eighteen million, three hundred seventy-nine thousand, three hundred ninety-four".