1816236 has 48 divisors (see below), whose sum is σ = 4798080. Its totient is φ = 594000.

The previous prime is 1816211. The next prime is 1816237. The reversal of 1816236 is 6326181.

It is a Harshad number since it is a multiple of its sum of digits (27).

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

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 15 ways as a sum of consecutive naturals, for example, 7111 + ... + 7361.

It is an arithmetic number, because the mean of its divisors is an integer number (99960).

2^1816236 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 1816236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2399040).

1816236 is an abundant number, since it is smaller than the sum of its proper divisors (2981844).

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

1816236 is a wasteful number, since it uses less digits than its factorization.

1816236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331 (or 323 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

The square root of 1816236 is about 1347.6780030853. The cubic root of 1816236 is about 122.0086888016.

The spelling of 1816236 in words is "one million, eight hundred sixteen thousand, two hundred thirty-six".