1816868 has 12 divisors (see below), whose sum is σ = 3189900. Its totient is φ = 905472.

The previous prime is 1816861. The next prime is 1816901. The reversal of 1816868 is 8686181.

It can be written as a sum of positive squares in 2 ways, for example, as 937024 + 879844 = 968^2 + 938^2 .

It is not an unprimeable number, because it can be changed into a prime (1816861) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 1208 + ... + 2256.

It is an arithmetic number, because the mean of its divisors is an integer number (265825).

2^1816868 is an apocalyptic number.

It is an amenable number.

1816868 is a deficient number, since it is larger than the sum of its proper divisors (1373032).

1816868 is a wasteful number, since it uses less digits than its factorization.

1816868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1486 (or 1484 counting only the distinct ones).

The product of its digits is 18432, while the sum is 38.

The square root of 1816868 is about 1347.9124600656. The cubic root of 1816868 is about 122.0228390458.

The spelling of 1816868 in words is "one million, eight hundred sixteen thousand, eight hundred sixty-eight".