311283236940 has 768 divisors, whose sum is σ = 1079466393600. Its totient is φ = 66239078400.

The previous prime is 311283236881. The next prime is 311283236977. The reversal of 311283236940 is 49632382113.

It is a junction number, because it is equal to n+sod(n) for n = 311283236892 and 311283236901.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 940432575 + ... + 940432905.

It is an arithmetic number, because the mean of its divisors is an integer number (1405555200).

Almost surely, 2^311283236940 is an apocalyptic number.

311283236940 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 311283236940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (539733196800).

311283236940 is an abundant number, since it is smaller than the sum of its proper divisors (768183156660).

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

311283236940 is a wasteful number, since it uses less digits than its factorization.

311283236940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 518 (or 516 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The spelling of 311283236940 in words is "three hundred eleven billion, two hundred eighty-three million, two hundred thirty-six thousand, nine hundred forty".