1813144 has 8 divisors (see below), whose sum is σ = 3399660. Its totient is φ = 906568.

The previous prime is 1813139. The next prime is 1813157. The reversal of 1813144 is 4413181.

It is a tau number, because it is divible by the number of its divisors (8).

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, 113314 + ... + 113329.

2^1813144 is an apocalyptic number.

It is an amenable number.

1813144 is a deficient number, since it is larger than the sum of its proper divisors (1586516).

1813144 is a wasteful number, since it uses less digits than its factorization.

1813144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 226649 (or 226645 counting only the distinct ones).

The product of its digits is 384, while the sum is 22.

The square root of 1813144 is about 1346.5303561376. The cubic root of 1813144 is about 121.9394127184.

The spelling of 1813144 in words is "one million, eight hundred thirteen thousand, one hundred forty-four".