820366 has 8 divisors (see below), whose sum is σ = 1238184. Its totient is φ = 407640.

The previous prime is 820361. The next prime is 820367. The reversal of 820366 is 663028.

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 820366.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820361) 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, 840 + ... + 1531.

It is an arithmetic number, because the mean of its divisors is an integer number (154773).

2⁸²⁰³⁶⁶ is an apocalyptic number.

820366 is a deficient number, since it is larger than the sum of its proper divisors (417818).

820366 is a wasteful number, since it uses less digits than its factorization.

820366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2546.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 820366 is about 905.7405809612. The cubic root of 820366 is about 93.6129398673.

The spelling of 820366 in words is "eight hundred twenty thousand, three hundred sixty-six".