818868 has 12 divisors (see below), whose sum is σ = 1910720. Its totient is φ = 272952.

The previous prime is 818837. The next prime is 818887. The reversal of 818868 is 868818.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

818868 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 34108 + ... + 34131.

2⁸¹⁸⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

818868 is an abundant number, since it is smaller than the sum of its proper divisors (1091852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

818868 is a wasteful number, since it uses less digits than its factorization.

818868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68246 (or 68244 counting only the distinct ones).

The product of its digits is 24576, while the sum is 39.

The square root of 818868 is about 904.9132555113. The cubic root of 818868 is about 93.5559256298. Note that the first 3 decimals are identical.

It can be divided in two parts, 8188 and 68, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 818868 in words is "eight hundred eighteen thousand, eight hundred sixty-eight".