1918844 has 12 divisors (see below), whose sum is σ = 3504144. Its totient is φ = 917664.

The previous prime is 1918837. The next prime is 1918849. The reversal of 1918844 is 4488191.

It is a super-3 number, since 3×1918844³ = 21195333781651666752, which contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1918849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10337 + ... + 10520.

It is an arithmetic number, because the mean of its divisors is an integer number (292012).

2^1918844 is an apocalyptic number.

It is an amenable number.

1918844 is a deficient number, since it is larger than the sum of its proper divisors (1585300).

1918844 is a wasteful number, since it uses less digits than its factorization.

1918844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20884 (or 20882 counting only the distinct ones).

The product of its digits is 9216, while the sum is 35.

The square root of 1918844 is about 1385.2234476791. The cubic root of 1918844 is about 124.2643510583.

The spelling of 1918844 in words is "one million, nine hundred eighteen thousand, eight hundred forty-four".