1812347344 has 40 divisors (see below), whose sum is σ = 3637668960. Its totient is φ = 873683328.

The previous prime is 1812347269. The next prime is 1812347371. The reversal of 1812347344 is 4437432181.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 381367 + ... + 386089.

It is an arithmetic number, because the mean of its divisors is an integer number (90941724).

Almost surely, 2^1812347344 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1812347344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1818834480).

1812347344 is an abundant number, since it is smaller than the sum of its proper divisors (1825321616).

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

1812347344 is a wasteful number, since it uses less digits than its factorization.

1812347344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5587 (or 5581 counting only the distinct ones).

The product of its digits is 64512, while the sum is 37.

The square root of 1812347344 is about 42571.6730232675. The cubic root of 1812347344 is about 1219.2155092772.

The spelling of 1812347344 in words is "one billion, eight hundred twelve million, three hundred forty-seven thousand, three hundred forty-four".