820814 has 8 divisors (see below), whose sum is σ = 1244208. Its totient is φ = 406080.

The previous prime is 820793. The next prime is 820837. The reversal of 820814 is 418028.

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

It is a self number, because there is not a number n which added to its sum of digits gives 820814.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1922 + ... + 2309.

It is an arithmetic number, because the mean of its divisors is an integer number (155526).

2⁸²⁰⁸¹⁴ is an apocalyptic number.

820814 is a deficient number, since it is larger than the sum of its proper divisors (423394).

820814 is a wasteful number, since it uses less digits than its factorization.

820814 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4330.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 820814 is about 905.9878586383. The cubic root of 820814 is about 93.6299773706.

The spelling of 820814 in words is "eight hundred twenty thousand, eight hundred fourteen".