1811396 has 12 divisors (see below), whose sum is σ = 3192000. Its totient is φ = 899400.

The previous prime is 1811389. The next prime is 1811413. The reversal of 1811396 is 6931181.

It is a happy number.

It is an Ulam number.

It is an unprimeable number.

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, 896 + ... + 2103.

It is an arithmetic number, because the mean of its divisors is an integer number (266000).

2^1811396 is an apocalyptic number.

It is an amenable number.

1811396 is a deficient number, since it is larger than the sum of its proper divisors (1380604).

1811396 is a wasteful number, since it uses less digits than its factorization.

1811396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3154 (or 3152 counting only the distinct ones).

The product of its digits is 1296, while the sum is 29.

The square root of 1811396 is about 1345.8811240225. The cubic root of 1811396 is about 121.9002140250.

The spelling of 1811396 in words is "one million, eight hundred eleven thousand, three hundred ninety-six".