311648 has 12 divisors (see below), whose sum is σ = 613620. Its totient is φ = 155808.

The previous prime is 311609. The next prime is 311653. The reversal of 311648 is 846113.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 311648.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4838 + ... + 4901.

It is an arithmetic number, because the mean of its divisors is an integer number (51135).

2³¹¹⁶⁴⁸ is an apocalyptic number.

It is an amenable number.

311648 is a deficient number, since it is larger than the sum of its proper divisors (301972).

311648 is an equidigital number, since it uses as much as digits as its factorization.

311648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9749 (or 9741 counting only the distinct ones).

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

The square root of 311648 is about 558.2544222843. The cubic root of 311648 is about 67.7987127145.

It can be divided in two parts, 311 and 648, that added together give a palindrome (959).

The spelling of 311648 in words is "three hundred eleven thousand, six hundred forty-eight".