311244040140 has 192 divisors, whose sum is σ = 971953274880. Its totient is φ = 73770428160.

The previous prime is 311244040109. The next prime is 311244040141. The reversal of 311244040140 is 41040442113.

It is a self number, because there is not a number n which added to its sum of digits gives 311244040140.

It is not an unprimeable number, because it can be changed into a prime (311244040141) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32969541 + ... + 32978979.

It is an arithmetic number, because the mean of its divisors is an integer number (5062256640).

Almost surely, 2^311244040140 is an apocalyptic number.

311244040140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311244040140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (485976637440).

311244040140 is an abundant number, since it is smaller than the sum of its proper divisors (660709234740).

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

311244040140 is a wasteful number, since it uses less digits than its factorization.

311244040140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10572 (or 10570 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 311244040140 its reverse (41040442113), we get a palindrome (352284482253).

The spelling of 311244040140 in words is "three hundred eleven billion, two hundred forty-four million, forty thousand, one hundred forty".