312116388 has 12 divisors (see below), whose sum is σ = 728271600. Its totient is φ = 104038792.

The previous prime is 312116383. The next prime is 312116411. The reversal of 312116388 is 883611213.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (312116381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13004838 + ... + 13004861.

It is an arithmetic number, because the mean of its divisors is an integer number (60689300).

Almost surely, 2^312116388 is an apocalyptic number.

It is an amenable number.

312116388 is an abundant number, since it is smaller than the sum of its proper divisors (416155212).

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

312116388 is a wasteful number, since it uses less digits than its factorization.

312116388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26009706 (or 26009704 counting only the distinct ones).

The product of its digits is 6912, while the sum is 33.

The square root of 312116388 is about 17666.8160119474. The cubic root of 312116388 is about 678.3266149380.

It can be divided in two parts, 3121163 and 88, that added together give a triangular number (3121251 = T₂₄₉₈).

The spelling of 312116388 in words is "three hundred twelve million, one hundred sixteen thousand, three hundred eighty-eight".