311648140 has 24 divisors (see below), whose sum is σ = 658636272. Its totient is φ = 123864000.

The previous prime is 311648111. The next prime is 311648167. The reversal of 311648140 is 41846113.

311648140 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 311648099 and 311648108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 46486 + ... + 52765.

It is an arithmetic number, because the mean of its divisors is an integer number (27443178).

Almost surely, 2^311648140 is an apocalyptic number.

It is an amenable number.

311648140 is an abundant number, since it is smaller than the sum of its proper divisors (346988132).

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

311648140 is a wasteful number, since it uses less digits than its factorization.

311648140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99417 (or 99415 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 311648140 is about 17653.5588480057. The cubic root of 311648140 is about 677.9872286674.

It can be divided in two parts, 31164 and 8140, that added together give a cube (39304 = 34³).

The spelling of 311648140 in words is "three hundred eleven million, six hundred forty-eight thousand, one hundred forty".