312856 has 8 divisors (see below), whose sum is σ = 586620. Its totient is φ = 156424.

The previous prime is 312841. The next prime is 312857. The reversal of 312856 is 658213.

It is a happy number.

312856 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a self number, because there is not a number n which added to its sum of digits gives 312856.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312857) by changing a digit.

312856 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 (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19546 + ... + 19561.

2³¹²⁸⁵⁶ is an apocalyptic number.

It is an amenable number.

312856 is a deficient number, since it is larger than the sum of its proper divisors (273764).

312856 is a wasteful number, since it uses less digits than its factorization.

312856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39113 (or 39109 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 312856 is about 559.3353198217. The cubic root of 312856 is about 67.8861995070.

The spelling of 312856 in words is "three hundred twelve thousand, eight hundred fifty-six".