863816 has 16 divisors (see below), whose sum is σ = 1705200. Its totient is φ = 409104.

The previous prime is 863803. The next prime is 863833. The reversal of 863816 is 618368.

863816 = 94² + 95² + ... + 150².

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2690 + ... + 2993.

It is an arithmetic number, because the mean of its divisors is an integer number (106575).

2⁸⁶³⁸¹⁶ is an apocalyptic number.

It is an amenable number.

863816 is a deficient number, since it is larger than the sum of its proper divisors (841384).

863816 is a wasteful number, since it uses less digits than its factorization.

863816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5708 (or 5704 counting only the distinct ones).

The product of its digits is 6912, while the sum is 32.

The square root of 863816 is about 929.4170215786. The cubic root of 863816 is about 95.2373014854.

The spelling of 863816 in words is "eight hundred sixty-three thousand, eight hundred sixteen".