1982785 has 12 divisors (see below), whose sum is σ = 2768148. Its totient is φ = 1359456.

The previous prime is 1982779. The next prime is 1982797. The reversal of 1982785 is 5872891.

It can be written as a sum of positive squares in 2 ways, for example, as 790321 + 1192464 = 889^2 + 1092^2 .

It is not a de Polignac number, because 1982785 - 2⁹ = 1982273 is a prime.

It is a Duffinian number.

1982785 is a lucky 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, 3802 + ... + 4291.

It is an arithmetic number, because the mean of its divisors is an integer number (230679).

2^1982785 is an apocalyptic number.

It is an amenable number.

1982785 is a deficient number, since it is larger than the sum of its proper divisors (785363).

1982785 is an equidigital number, since it uses as much as digits as its factorization.

1982785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8112 (or 8105 counting only the distinct ones).

The product of its digits is 40320, while the sum is 40.

The square root of 1982785 is about 1408.1139868633. The cubic root of 1982785 is about 125.6295704714.

The spelling of 1982785 in words is "one million, nine hundred eighty-two thousand, seven hundred eighty-five".