311369140 has 24 divisors (see below), whose sum is σ = 654458112. Its totient is φ = 124436640.

The previous prime is 311369089. The next prime is 311369141. The reversal of 311369140 is 41963113.

It is a junction number, because it is equal to n+sod(n) for n = 311369099 and 311369108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311369141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18297 + ... + 30943.

It is an arithmetic number, because the mean of its divisors is an integer number (27269088).

Almost surely, 2^311369140 is an apocalyptic number.

It is an amenable number.

311369140 is an abundant number, since it is smaller than the sum of its proper divisors (343088972).

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

311369140 is a wasteful number, since it uses less digits than its factorization.

311369140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13887 (or 13885 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 28.

The square root of 311369140 is about 17645.6549892601. The cubic root of 311369140 is about 677.7848477469.

The spelling of 311369140 in words is "three hundred eleven million, three hundred sixty-nine thousand, one hundred forty".