1982866 has 8 divisors (see below), whose sum is σ = 3023244. Its totient is φ = 975120.

The previous prime is 1982861. The next prime is 1982873. The reversal of 1982866 is 6682891.

It can be written as a sum of positive squares in 2 ways, for example, as 1901641 + 81225 = 1379^2 + 285^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1982861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8005 + ... + 8248.

2^1982866 is an apocalyptic number.

1982866 is a deficient number, since it is larger than the sum of its proper divisors (1040378).

1982866 is a wasteful number, since it uses less digits than its factorization.

1982866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16316.

The product of its digits is 41472, while the sum is 40.

The square root of 1982866 is about 1408.1427484456. The cubic root of 1982866 is about 125.6312811724.

The spelling of 1982866 in words is "one million, nine hundred eighty-two thousand, eight hundred sixty-six".