818285 has 8 divisors (see below), whose sum is σ = 1057560. Its totient is φ = 604224.

The previous prime is 818281. The next prime is 818287. The reversal of 818285 is 582818.

It can be written as a sum of positive squares in 4 ways, for example, as 11881 + 806404 = 109^2 + 898^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 818285 - 2² = 818281 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818281) 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, 6230 + ... + 6359.

It is an arithmetic number, because the mean of its divisors is an integer number (132195).

2⁸¹⁸²⁸⁵ is an apocalyptic number.

It is an amenable number.

818285 is a deficient number, since it is larger than the sum of its proper divisors (239275).

818285 is a wasteful number, since it uses less digits than its factorization.

818285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12607.

The product of its digits is 5120, while the sum is 32.

The square root of 818285 is about 904.5910678312. The cubic root of 818285 is about 93.5337177144.

The spelling of 818285 in words is "eight hundred eighteen thousand, two hundred eighty-five".