816868 has 24 divisors (see below), whose sum is σ = 1608768. Its totient is φ = 360096.

The previous prime is 816859. The next prime is 816869. The reversal of 816868 is 868618.

It is not an unprimeable number, because it can be changed into a prime (816869) 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 7 ways as a sum of consecutive naturals, for example, 855 + ... + 1537.

It is an arithmetic number, because the mean of its divisors is an integer number (67032).

2⁸¹⁶⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

816868 is a deficient number, since it is larger than the sum of its proper divisors (791900).

816868 is a wasteful number, since it uses less digits than its factorization.

816868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723 (or 721 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The square root of 816868 is about 903.8075016285. The cubic root of 816868 is about 93.4796966601.

The spelling of 816868 in words is "eight hundred sixteen thousand, eight hundred sixty-eight".