863822 has 4 divisors (see below), whose sum is σ = 1295736. Its totient is φ = 431910.

The previous prime is 863803. The next prime is 863833. The reversal of 863822 is 228368.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 215954 + ... + 215957.

It is an arithmetic number, because the mean of its divisors is an integer number (323934).

2⁸⁶³⁸²² is an apocalyptic number.

863822 is a deficient number, since it is larger than the sum of its proper divisors (431914).

863822 is a wasteful number, since it uses less digits than its factorization.

863822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431913.

The product of its digits is 4608, while the sum is 29.

The square root of 863822 is about 929.4202494028. The cubic root of 863822 is about 95.2375219886.

It can be divided in two parts, 8638 and 22, that multiplied together give a triangular number (190036 = T₆₁₆).

The spelling of 863822 in words is "eight hundred sixty-three thousand, eight hundred twenty-two".