311308812 has 24 divisors (see below), whose sum is σ = 807097200. Its totient is φ = 103769568.

The previous prime is 311308771. The next prime is 311308813. The reversal of 311308812 is 218803113.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (311308813) by changing a digit.

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, 1441137 + ... + 1441352.

It is an arithmetic number, because the mean of its divisors is an integer number (33629050).

Almost surely, 2^311308812 is an apocalyptic number.

It is an amenable number.

311308812 is an abundant number, since it is smaller than the sum of its proper divisors (495788388).

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

311308812 is a wasteful number, since it uses less digits than its factorization.

311308812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2882502 (or 2882494 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 311308812 is about 17643.9454771318. The cubic root of 311308812 is about 677.7410711486.

The spelling of 311308812 in words is "three hundred eleven million, three hundred eight thousand, eight hundred twelve".