820318 has 16 divisors (see below), whose sum is σ = 1360800. Its totient is φ = 368896.

The previous prime is 820279. The next prime is 820319. The reversal of 820318 is 813028.

It is a super-2 number, since 2×820318² = 1345843242248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820319) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 258 + ... + 1306.

It is an arithmetic number, because the mean of its divisors is an integer number (85050).

2⁸²⁰³¹⁸ is an apocalyptic number.

820318 is a deficient number, since it is larger than the sum of its proper divisors (540482).

820318 is a wasteful number, since it uses less digits than its factorization.

820318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1091.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 820318 is about 905.7140829202. The cubic root of 820318 is about 93.6111140527.

The spelling of 820318 in words is "eight hundred twenty thousand, three hundred eighteen".