1881844 has 6 divisors (see below), whose sum is σ = 3293234. Its totient is φ = 940920.

The previous prime is 1881823. The next prime is 1881851. The reversal of 1881844 is 4481881.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1690000 + 191844 = 1300^2 + 438^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 235227 + ... + 235234.

2^1881844 is an apocalyptic number.

It is an amenable number.

1881844 is a deficient number, since it is larger than the sum of its proper divisors (1411390).

1881844 is a wasteful number, since it uses less digits than its factorization.

1881844 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 470465 (or 470463 counting only the distinct ones).

The product of its digits is 8192, while the sum is 34.

The square root of 1881844 is about 1371.8031928815. The cubic root of 1881844 is about 123.4604549202.

The spelling of 1881844 in words is "one million, eight hundred eighty-one thousand, eight hundred forty-four".