818885 has 8 divisors (see below), whose sum is σ = 988800. Its totient is φ = 651024.

The previous prime is 818837. The next prime is 818887. The reversal of 818885 is 588818.

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 818885 - 2⁶ = 818821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (818887) 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, 584 + ... + 1406.

It is an arithmetic number, because the mean of its divisors is an integer number (123600).

2⁸¹⁸⁸⁸⁵ is an apocalyptic number.

It is an amenable number.

818885 is a deficient number, since it is larger than the sum of its proper divisors (169915).

818885 is a wasteful number, since it uses less digits than its factorization.

818885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1027.

The product of its digits is 20480, while the sum is 38.

The square root of 818885 is about 904.9226486280. The cubic root of 818885 is about 93.5565730438.

The spelling of 818885 in words is "eight hundred eighteen thousand, eight hundred eighty-five".