311140 has 24 divisors (see below), whose sum is σ = 669312. Its totient is φ = 121440.

The previous prime is 311137. The next prime is 311153. The reversal of 311140 is 41113.

It is a happy number.

311140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (10).

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 7 ways as a sum of consecutive naturals, for example, 775 + ... + 1105.

It is an arithmetic number, because the mean of its divisors is an integer number (27888).

2³¹¹¹⁴⁰ is an apocalyptic number.

It is an amenable number.

311140 is an abundant number, since it is smaller than the sum of its proper divisors (358172).

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

311140 is a wasteful number, since it uses less digits than its factorization.

311140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387 (or 385 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 10.

The square root of 311140 is about 557.7992470414. The cubic root of 311140 is about 67.7618543819.

Adding to 311140 its reverse (41113), we get a palindrome (352253).

The spelling of 311140 in words is "three hundred eleven thousand, one hundred forty", and thus it is an iban number.