311242808 has 32 divisors (see below), whose sum is σ = 623820960. Its totient is φ = 145221120.

The previous prime is 311242751. The next prime is 311242843. The reversal of 311242808 is 808242113.

It is a congruent number.

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, 13085 + ... + 28172.

It is an arithmetic number, because the mean of its divisors is an integer number (19494405).

Almost surely, 2^311242808 is an apocalyptic number.

It is an amenable number.

311242808 is an abundant number, since it is smaller than the sum of its proper divisors (312578152).

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

311242808 is a wasteful number, since it uses less digits than its factorization.

311242808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41327 (or 41323 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 29.

The square root of 311242808 is about 17642.0749346555. The cubic root of 311242808 is about 677.6931693205.

The spelling of 311242808 in words is "three hundred eleven million, two hundred forty-two thousand, eight hundred eight".