818906 has 8 divisors (see below), whose sum is σ = 1340064. Its totient is φ = 372220.

The previous prime is 818897. The next prime is 818947. The reversal of 818906 is 609818.

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

It is a Curzon number.

It is an unprimeable number.

818906 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18590 + ... + 18633.

It is an arithmetic number, because the mean of its divisors is an integer number (167508).

2⁸¹⁸⁹⁰⁶ is an apocalyptic number.

818906 is a deficient number, since it is larger than the sum of its proper divisors (521158).

818906 is a wasteful number, since it uses less digits than its factorization.

818906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37236.

The product of its (nonzero) digits is 3456, while the sum is 32.

The square root of 818906 is about 904.9342517553. The cubic root of 818906 is about 93.5573727781.

The spelling of 818906 in words is "eight hundred eighteen thousand, nine hundred six".