1811404 has 12 divisors (see below), whose sum is σ = 3622864. Its totient is φ = 776304.

The previous prime is 1811389. The next prime is 1811413. The reversal of 1811404 is 4041181.

1811404 is an admirable number.

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, 32319 + ... + 32374.

2^1811404 is an apocalyptic number.

1811404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1811404 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1811404 is a wasteful number, since it uses less digits than its factorization.

1811404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64704 (or 64702 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 1811404 is about 1345.8840960499. The cubic root of 1811404 is about 121.9003934815.

Adding to 1811404 its reverse (4041181), we get a palindrome (5852585).

The spelling of 1811404 in words is "one million, eight hundred eleven thousand, four hundred four".