1982686 has 4 divisors (see below), whose sum is σ = 2974032. Its totient is φ = 991342.

The previous prime is 1982681. The next prime is 1982713. The reversal of 1982686 is 6862891.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1982681) by changing a digit.

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, 495670 + ... + 495673.

It is an arithmetic number, because the mean of its divisors is an integer number (743508).

2^1982686 is an apocalyptic number.

1982686 is a deficient number, since it is larger than the sum of its proper divisors (991346).

1982686 is an equidigital number, since it uses as much as digits as its factorization.

1982686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991345.

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

The square root of 1982686 is about 1408.0788330204. The cubic root of 1982686 is about 125.6274795514.

The spelling of 1982686 in words is "one million, nine hundred eighty-two thousand, six hundred eighty-six".