1811408 has 10 divisors (see below), whose sum is σ = 3509634. Its totient is φ = 905696.

The previous prime is 1811389. The next prime is 1811413. The reversal of 1811408 is 8041181.

It can be written as a sum of positive squares in only one way, i.e., 1281424 + 529984 = 1132^2 + 728^2 .

It is a congruent 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 as a sum of consecutive naturals, namely, 56591 + ... + 56622.

2^1811408 is an apocalyptic number.

It is an amenable number.

1811408 is a deficient number, since it is larger than the sum of its proper divisors (1698226).

1811408 is a wasteful number, since it uses less digits than its factorization.

1811408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113221 (or 113215 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 23.

The square root of 1811408 is about 1345.8855820611. The cubic root of 1811408 is about 121.9004832095.

Adding to 1811408 its reverse (8041181), we get a palindrome (9852589).

The spelling of 1811408 in words is "one million, eight hundred eleven thousand, four hundred eight".