311443120040 has 64 divisors (see below), whose sum is σ = 794369116800. Its totient is φ = 108942043392.

The previous prime is 311443120039. The next prime is 311443120049. The reversal of 311443120040 is 40021344113.

It is a junction number, because it is equal to n+sod(n) for n = 311443119988 and 311443120015.

It is not an unprimeable number, because it can be changed into a prime (311443120049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15751412 + ... + 15771171.

It is an arithmetic number, because the mean of its divisors is an integer number (12412017450).

Almost surely, 2^311443120040 is an apocalyptic number.

It is an amenable number.

311443120040 is an abundant number, since it is smaller than the sum of its proper divisors (482925996760).

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

311443120040 is a wasteful number, since it uses less digits than its factorization.

311443120040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31522626 (or 31522622 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 311443120040 its reverse (40021344113), we get a palindrome (351464464153).

The spelling of 311443120040 in words is "three hundred eleven billion, four hundred forty-three million, one hundred twenty thousand, forty".