311994128 has 20 divisors (see below), whose sum is σ = 611283420. Its totient is φ = 154243584.

The previous prime is 311994083. The next prime is 311994167. The reversal of 311994128 is 821499113.

311994128 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 75203584 + 236790544 = 8672^2 + 15388^2 .

It is a junction number, because it is equal to n+sod(n) for n = 311994091 and 311994100.

It is an unprimeable number.

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, 108125 + ... + 110972.

It is an arithmetic number, because the mean of its divisors is an integer number (30564171).

Almost surely, 2^311994128 is an apocalyptic number.

It is an amenable number.

311994128 is a deficient number, since it is larger than the sum of its proper divisors (299289292).

311994128 is a wasteful number, since it uses less digits than its factorization.

311994128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219194 (or 219188 counting only the distinct ones).

The product of its digits is 15552, while the sum is 38.

The square root of 311994128 is about 17663.3555136050. The cubic root of 311994128 is about 678.2380336202.

The spelling of 311994128 in words is "three hundred eleven million, nine hundred ninety-four thousand, one hundred twenty-eight".