311881868 has 12 divisors (see below), whose sum is σ = 546193200. Its totient is φ = 155826672.

The previous prime is 311881861. The next prime is 311881877. The reversal of 311881868 is 868188113.

It is not an unprimeable number, because it can be changed into a prime (311881861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22271 + ... + 33462.

It is an arithmetic number, because the mean of its divisors is an integer number (45516100).

Almost surely, 2^311881868 is an apocalyptic number.

It is an amenable number.

311881868 is a deficient number, since it is larger than the sum of its proper divisors (234311332).

311881868 is a wasteful number, since it uses less digits than its factorization.

311881868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57136 (or 57134 counting only the distinct ones).

The product of its digits is 73728, while the sum is 44.

The square root of 311881868 is about 17660.1774623020. The cubic root of 311881868 is about 678.1566772435.

The spelling of 311881868 in words is "three hundred eleven million, eight hundred eighty-one thousand, eight hundred sixty-eight".