1816438914 has 24 divisors (see below), whose sum is σ = 3979841580. Its totient is φ = 598675968.

The previous prime is 1816438903. The next prime is 1816438927. The reversal of 1816438914 is 4198346181.

It can be written as a sum of positive squares in 2 ways, for example, as 1816038225 + 400689 = 42615^2 + 633^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1816438914.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 565327 + ... + 568530.

Almost surely, 2^1816438914 is an apocalyptic number.

1816438914 is an abundant number, since it is smaller than the sum of its proper divisors (2163402666).

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

1816438914 is a wasteful number, since it uses less digits than its factorization.

1816438914 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1133954 (or 1133951 counting only the distinct ones).

The product of its digits is 165888, while the sum is 45.

The square root of 1816438914 is about 42619.7010078672. The cubic root of 1816438914 is about 1220.1323232807.

The spelling of 1816438914 in words is "one billion, eight hundred sixteen million, four hundred thirty-eight thousand, nine hundred fourteen".