311049856 has 64 divisors (see below), whose sum is σ = 673958880. Its totient is φ = 142138368.

The previous prime is 311049847. The next prime is 311049863. The reversal of 311049856 is 658940113.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 177175 + ... + 178921.

Almost surely, 2^311049856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 311049856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336979440).

311049856 is an abundant number, since it is smaller than the sum of its proper divisors (362909024).

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

311049856 is a wasteful number, since it uses less digits than its factorization.

311049856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1881 (or 1869 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 311049856 is about 17636.6055690997. The cubic root of 311049856 is about 677.5530972397.

Adding to 311049856 its reverse (658940113), we get a palindrome (969989969).

The spelling of 311049856 in words is "three hundred eleven million, forty-nine thousand, eight hundred fifty-six".