312822 has 20 divisors (see below), whose sum is σ = 701316. Its totient is φ = 104220.

The previous prime is 312799. The next prime is 312839. The reversal of 312822 is 228213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 312795 and 312804.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 312822.

It is an unprimeable number.

312822 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 9 ways as a sum of consecutive naturals, for example, 804 + ... + 1127.

2³¹²⁸²² is an apocalyptic number.

312822 is an abundant number, since it is smaller than the sum of its proper divisors (388494).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

312822 is a wasteful number, since it uses less digits than its factorization.

312822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1945 (or 1936 counting only the distinct ones).

The product of its digits is 192, while the sum is 18.

The square root of 312822 is about 559.3049257784. The cubic root of 312822 is about 67.8837402133.

The spelling of 312822 in words is "three hundred twelve thousand, eight hundred twenty-two".