311128 has 8 divisors (see below), whose sum is σ = 583380. Its totient is φ = 155560.

The previous prime is 311123. The next prime is 311137. The reversal of 311128 is 821113.

311128 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311123) by changing a digit.

311128 is an untouchable number, because it is not equal to the sum of proper divisors of any 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 as a sum of consecutive naturals, namely, 19438 + ... + 19453.

2³¹¹¹²⁸ is an apocalyptic number.

It is an amenable number.

311128 is a deficient number, since it is larger than the sum of its proper divisors (272252).

311128 is a wasteful number, since it uses less digits than its factorization.

311128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38897 (or 38893 counting only the distinct ones).

The product of its digits is 48, while the sum is 16.

The square root of 311128 is about 557.7884903796. The cubic root of 311128 is about 67.7609832277.

The spelling of 311128 in words is "three hundred eleven thousand, one hundred twenty-eight".