866368 has 14 divisors (see below), whose sum is σ = 1719326. Its totient is φ = 433152.

The previous prime is 866353. The next prime is 866389. The reversal of 866368 is 863668.

It can be written as a sum of positive squares in only one way, i.e., 861184 + 5184 = 928^2 + 72^2 .

It is a super-2 number, since 2×866368² = 1501187022848, which contains 22 as substring.

It is a plaindrome in base 13.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6705 + ... + 6832.

It is an arithmetic number, because the mean of its divisors is an integer number (122809).

2⁸⁶⁶³⁶⁸ is an apocalyptic number.

It is an amenable number.

866368 is a deficient number, since it is larger than the sum of its proper divisors (852958).

866368 is a wasteful number, since it uses less digits than its factorization.

866368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13549 (or 13539 counting only the distinct ones).

The product of its digits is 41472, while the sum is 37.

The square root of 866368 is about 930.7889126972. The cubic root of 866368 is about 95.3309968402.

The spelling of 866368 in words is "eight hundred sixty-six thousand, three hundred sixty-eight".