312865340 has 96 divisors (see below), whose sum is σ = 712454400. Its totient is φ = 115153920.

The previous prime is 312865339. The next prime is 312865351. The reversal of 312865340 is 43568213.

312865340 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 312865297 and 312865306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1308941 + ... + 1309179.

It is an arithmetic number, because the mean of its divisors is an integer number (7421400).

Almost surely, 2^312865340 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312865340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (356227200).

312865340 is an abundant number, since it is smaller than the sum of its proper divisors (399589060).

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

312865340 is a wasteful number, since it uses less digits than its factorization.

312865340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 375 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 312865340 is about 17687.9998869290. Note that the first 3 decimals coincide. The cubic root of 312865340 is about 678.8687505826.

The spelling of 312865340 in words is "three hundred twelve million, eight hundred sixty-five thousand, three hundred forty".