311864 has 16 divisors (see below), whose sum is σ = 668400. Its totient is φ = 133632.

The previous prime is 311827. The next prime is 311867. The reversal of 311864 is 468113.

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 pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2729 + ... + 2840.

It is an arithmetic number, because the mean of its divisors is an integer number (41775).

2³¹¹⁸⁶⁴ is an apocalyptic number.

It is an amenable number.

311864 is an abundant number, since it is smaller than the sum of its proper divisors (356536).

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

311864 is a wasteful number, since it uses less digits than its factorization.

311864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5582 (or 5578 counting only the distinct ones).

The product of its digits is 576, while the sum is 23.

The square root of 311864 is about 558.4478489528. The cubic root of 311864 is about 67.8143726256.

Adding to 311864 its reverse (468113), we get a palindrome (779977).

The spelling of 311864 in words is "three hundred eleven thousand, eight hundred sixty-four".