863668 has 24 divisors (see below), whose sum is σ = 1725192. Its totient is φ = 374784.

The previous prime is 863641. The next prime is 863671. The reversal of 863668 is 866368.

It can be written as a sum of positive squares in 4 ways, for example, as 283024 + 580644 = 532^2 + 762^2 .

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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, 396 + ... + 1372.

It is an arithmetic number, because the mean of its divisors is an integer number (71883).

2⁸⁶³⁶⁶⁸ is an apocalyptic number.

It is an amenable number.

863668 is a deficient number, since it is larger than the sum of its proper divisors (861524).

863668 is a wasteful number, since it uses less digits than its factorization.

863668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011 (or 1009 counting only the distinct ones).

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

The square root of 863668 is about 929.3373983651. The cubic root of 863668 is about 95.2318620841.

The spelling of 863668 in words is "eight hundred sixty-three thousand, six hundred sixty-eight".