1985788 has 12 divisors (see below), whose sum is σ = 3971632. Its totient is φ = 851040.

The previous prime is 1985779. The next prime is 1985791. The reversal of 1985788 is 8875891.

1985788 is an admirable number.

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 in 3 ways as a sum of consecutive naturals, for example, 35433 + ... + 35488.

2^1985788 is an apocalyptic number.

It is an amenable number.

1985788 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1985788 is a wasteful number, since it uses less digits than its factorization.

1985788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70932 (or 70930 counting only the distinct ones).

The product of its digits is 161280, while the sum is 46.

The square root of 1985788 is about 1409.1799033480. The cubic root of 1985788 is about 125.6929619972.

The spelling of 1985788 in words is "one million, nine hundred eighty-five thousand, seven hundred eighty-eight".