311860 has 24 divisors (see below), whose sum is σ = 677376. Its totient is φ = 120480.

The previous prime is 311827. The next prime is 311867. The reversal of 311860 is 68113.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

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 7 ways as a sum of consecutive naturals, for example, 369 + ... + 871.

It is an arithmetic number, because the mean of its divisors is an integer number (28224).

2³¹¹⁸⁶⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (338688).

311860 is an abundant number, since it is smaller than the sum of its proper divisors (365516).

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

311860 is a wasteful number, since it uses less digits than its factorization.

311860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543 (or 541 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 311860 is about 558.4442675863. Note that the first 3 decimals coincide. The cubic root of 311860 is about 67.8140826929.

Adding to 311860 its reverse (68113), we get a palindrome (379973).

It can be divided in two parts, 31 and 1860, that added together give a triangular number (1891 = T₆₁).

The spelling of 311860 in words is "three hundred eleven thousand, eight hundred sixty".