311868 has 18 divisors (see below), whose sum is σ = 788424. Its totient is φ = 103944.

The previous prime is 311867. The next prime is 311869. The reversal of 311868 is 868113.

311868 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (311867) and next prime (311869).

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311867) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4296 + ... + 4367.

2³¹¹⁸⁶⁸ is an apocalyptic number.

It is an amenable number.

311868 is an abundant number, since it is smaller than the sum of its proper divisors (476556).

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

311868 is a wasteful number, since it uses less digits than its factorization.

311868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8673 (or 8668 counting only the distinct ones).

The product of its digits is 1152, while the sum is 27.

The square root of 311868 is about 558.4514302963. The cubic root of 311868 is about 67.8146625557.

The spelling of 311868 in words is "three hundred eleven thousand, eight hundred sixty-eight".