311384140 has 24 divisors (see below), whose sum is σ = 654286752. Its totient is φ = 124481280.

The previous prime is 311384137. The next prime is 311384153. The reversal of 311384140 is 41483113.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42852 + ... + 49588.

It is an arithmetic number, because the mean of its divisors is an integer number (27261948).

Almost surely, 2^311384140 is an apocalyptic number.

It is an amenable number.

311384140 is an abundant number, since it is smaller than the sum of its proper divisors (342902612).

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

311384140 is a wasteful number, since it uses less digits than its factorization.

311384140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9057 (or 9055 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 25.

The square root of 311384140 is about 17646.0800179530. The cubic root of 311384140 is about 677.7957315160.

The spelling of 311384140 in words is "three hundred eleven million, three hundred eighty-four thousand, one hundred forty".