312408 has 24 divisors (see below), whose sum is σ = 846300. Its totient is φ = 104112.

The previous prime is 312407. The next prime is 312413. The reversal of 312408 is 804213.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

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

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (312401) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 2098 + ... + 2241.

2³¹²⁴⁰⁸ is an apocalyptic number.

It is an amenable number.

312408 is an abundant number, since it is smaller than the sum of its proper divisors (533892).

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

312408 is a wasteful number, since it uses less digits than its factorization.

312408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4351 (or 4344 counting only the distinct ones).

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

The square root of 312408 is about 558.9347010161. The cubic root of 312408 is about 67.8537803900.

The spelling of 312408 in words is "three hundred twelve thousand, four hundred eight".