820982 has 4 divisors (see below), whose sum is σ = 1231476. Its totient is φ = 410490.

The previous prime is 820969. The next prime is 820991. The reversal of 820982 is 289028.

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

It is a super-2 number, since 2×820982² = 1348022888648, which contains 22 as substring.

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, 205244 + ... + 205247.

It is an arithmetic number, because the mean of its divisors is an integer number (307869).

2⁸²⁰⁹⁸² is an apocalyptic number.

820982 is a deficient number, since it is larger than the sum of its proper divisors (410494).

820982 is a wasteful number, since it uses less digits than its factorization.

820982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 410493.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 820982 is about 906.0805703689. The cubic root of 820982 is about 93.6363648360.

The spelling of 820982 in words is "eight hundred twenty thousand, nine hundred eighty-two".