1816238 has 8 divisors (see below), whose sum is σ = 2730888. Its totient is φ = 905944.

The previous prime is 1816237. The next prime is 1816247. The reversal of 1816238 is 8326181.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1816238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1816237) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 320 + ... + 1932.

It is an arithmetic number, because the mean of its divisors is an integer number (341361).

2^1816238 is an apocalyptic number.

1816238 is a deficient number, since it is larger than the sum of its proper divisors (914650).

1816238 is a wasteful number, since it uses less digits than its factorization.

1816238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2178.

The product of its digits is 2304, while the sum is 29.

The square root of 1816238 is about 1347.6787451021. The cubic root of 1816238 is about 122.0087335860.

The spelling of 1816238 in words is "one million, eight hundred sixteen thousand, two hundred thirty-eight".