312271866 has 48 divisors (see below), whose sum is σ = 711659520. Its totient is φ = 98822880.

The previous prime is 312271853. The next prime is 312271873. The reversal of 312271866 is 668172213.

It is a self number, because there is not a number n which added to its sum of digits gives 312271866.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24295 + ... + 34853.

It is an arithmetic number, because the mean of its divisors is an integer number (14826240).

Almost surely, 2^312271866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 312271866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (355829760).

312271866 is an abundant number, since it is smaller than the sum of its proper divisors (399387654).

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

312271866 is a wasteful number, since it uses less digits than its factorization.

312271866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10651 (or 10648 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 312271866 is about 17671.2157476502. The cubic root of 312271866 is about 678.4392303621.

The spelling of 312271866 in words is "three hundred twelve million, two hundred seventy-one thousand, eight hundred sixty-six".