1812043738 has 8 divisors (see below), whose sum is σ = 2748605940. Its totient is φ = 895841760.

The previous prime is 1812043729. The next prime is 1812043817. The reversal of 1812043738 is 8373402181.

It can be written as a sum of positive squares in 2 ways, for example, as 1811949489 + 94249 = 42567^2 + 307^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 1812043697 and 1812043706.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5089833 + ... + 5090188.

Almost surely, 2^1812043738 is an apocalyptic number.

1812043738 is a deficient number, since it is larger than the sum of its proper divisors (936562202).

1812043738 is a wasteful number, since it uses less digits than its factorization.

1812043738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10180112.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 1812043738 is about 42568.1070521112. The cubic root of 1812043738 is about 1219.1474241285.

The spelling of 1812043738 in words is "one billion, eight hundred twelve million, forty-three thousand, seven hundred thirty-eight".