817868 has 12 divisors (see below), whose sum is σ = 1466472. Its totient is φ = 398880.

The previous prime is 817867. The next prime is 817871. The reversal of 817868 is 868718.

It is not an unprimeable number, because it can be changed into a prime (817867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2330 + ... + 2657.

It is an arithmetic number, because the mean of its divisors is an integer number (122206).

2⁸¹⁷⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

817868 is a deficient number, since it is larger than the sum of its proper divisors (648604).

817868 is a wasteful number, since it uses less digits than its factorization.

817868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5032 (or 5030 counting only the distinct ones).

The product of its digits is 21504, while the sum is 38.

The square root of 817868 is about 904.3605475694. The cubic root of 817868 is about 93.5178266790.

The spelling of 817868 in words is "eight hundred seventeen thousand, eight hundred sixty-eight".