1806444 has 54 divisors (see below), whose sum is σ = 4853940. Its totient is φ = 566352.

The previous prime is 1806421. The next prime is 1806461. The reversal of 1806444 is 4446081.

1806444 is a `hidden beast` number, since 18 + 0 + 644 + 4 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 12927 + ... + 13065.

2^1806444 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1806444, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2426970).

1806444 is an abundant number, since it is smaller than the sum of its proper divisors (3047496).

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

1806444 is a wasteful number, since it uses less digits than its factorization.

1806444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 163 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 1806444 is about 1344.0401779709. The cubic root of 1806444 is about 121.7890289163.

The spelling of 1806444 in words is "one million, eight hundred six thousand, four hundred forty-four".