312390280 has 16 divisors (see below), whose sum is σ = 702878220. Its totient is φ = 124956096.

The previous prime is 312390269. The next prime is 312390289. The reversal of 312390280 is 82093213.

312390280 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 294259716 + 18130564 = 17154^2 + 4258^2 .

It is not an unprimeable number, because it can be changed into a prime (312390289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3904839 + ... + 3904918.

Almost surely, 2^312390280 is an apocalyptic number.

It is an amenable number.

312390280 is an abundant number, since it is smaller than the sum of its proper divisors (390487940).

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

312390280 is a wasteful number, since it uses less digits than its factorization.

312390280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7809768 (or 7809764 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 312390280 is about 17674.5659069749. The cubic root of 312390280 is about 678.5249746118.

The spelling of 312390280 in words is "three hundred twelve million, three hundred ninety thousand, two hundred eighty".