820022 has 8 divisors (see below), whose sum is σ = 1405776. Its totient is φ = 351432.

The previous prime is 819991. The next prime is 820037. The reversal of 820022 is 220028.

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

It is a Harshad number since it is a multiple of its sum of digits (14), and also a Moran number because the ratio is a prime number: 58573 = 820022 / (8 + 2 + 0 + 0 + 2 + 2).

It is a junction number, because it is equal to n+sod(n) for n = 819979 and 820006.

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, 29273 + ... + 29300.

It is an arithmetic number, because the mean of its divisors is an integer number (175722).

2⁸²⁰⁰²² is an apocalyptic number.

820022 is a deficient number, since it is larger than the sum of its proper divisors (585754).

820022 is a wasteful number, since it uses less digits than its factorization.

820022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58582.

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 820022 is about 905.5506612001. The cubic root of 820022 is about 93.5998532883.

The spelling of 820022 in words is "eight hundred twenty thousand, twenty-two".