1985944 has 8 divisors (see below), whose sum is σ = 3723660. Its totient is φ = 992968.

The previous prime is 1985939. The next prime is 1985987. The reversal of 1985944 is 4495891.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1985944² = 7887947142272, which contains 22 as substring.

It is a d-powerful number, because it can be written as 1 + 9 + 8⁵ + 5⁹ + 9 + 4² + 4² .

It is a junction number, because it is equal to n+sod(n) for n = 1985897 and 1985906.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 124114 + ... + 124129.

2^1985944 is an apocalyptic number.

It is an amenable number.

1985944 is a deficient number, since it is larger than the sum of its proper divisors (1737716).

1985944 is a wasteful number, since it uses less digits than its factorization.

1985944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248249 (or 248245 counting only the distinct ones).

The product of its digits is 51840, while the sum is 40.

The square root of 1985944 is about 1409.2352536039. The cubic root of 1985944 is about 125.6962533168.

The spelling of 1985944 in words is "one million, nine hundred eighty-five thousand, nine hundred forty-four".