312940 has 12 divisors (see below), whose sum is σ = 657216. Its totient is φ = 125168.

The previous prime is 312937. The next prime is 312941. The reversal of 312940 is 49213.

312940 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (312941) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7804 + ... + 7843.

It is an arithmetic number, because the mean of its divisors is an integer number (54768).

2³¹²⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

312940 is an abundant number, since it is smaller than the sum of its proper divisors (344276).

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

312940 is a wasteful number, since it uses less digits than its factorization.

312940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15656 (or 15654 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 312940 is about 559.4104039075. The cubic root of 312940 is about 67.8922746454.

The spelling of 312940 in words is "three hundred twelve thousand, nine hundred forty".