1855944 has 48 divisors (see below), whose sum is σ = 5089500. Its totient is φ = 610944.

The previous prime is 1855933. The next prime is 1855949. The reversal of 1855944 is 4495581.

It can be written as a sum of positive squares in 2 ways, for example, as 1855044 + 900 = 1362^2 + 30^2 .

It is a super-2 number, since 2×1855944² = 6889056262272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1855899 and 1855908.

It is not an unprimeable number, because it can be changed into a prime (1855949) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10642 + ... + 10814.

2^1855944 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 1855944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2544750).

1855944 is an abundant number, since it is smaller than the sum of its proper divisors (3233556).

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

1855944 is a wasteful number, since it uses less digits than its factorization.

1855944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334 (or 327 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 1855944 is about 1362.3303564114. The cubic root of 1855944 is about 122.8914370255.

The spelling of 1855944 in words is "one million, eight hundred fifty-five thousand, nine hundred forty-four".