1685944 has 48 divisors (see below), whose sum is σ = 3623400. Its totient is φ = 733824.

The previous prime is 1685933. The next prime is 1685951. The reversal of 1685944 is 4495861.

It is a happy number.

It is a super-2 number, since 2×1685944² = 5684814342272, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39187 + ... + 39229.

2^1685944 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 1685944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1811700).

1685944 is an abundant number, since it is smaller than the sum of its proper divisors (1937456).

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

1685944 is a wasteful number, since it uses less digits than its factorization.

1685944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104 (or 87 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 1685944 is about 1298.4390628751. The cubic root of 1685944 is about 119.0184751110.

The spelling of 1685944 in words is "one million, six hundred eighty-five thousand, nine hundred forty-four".