311907812 has 6 divisors (see below), whose sum is σ = 545838678. Its totient is φ = 155953904.

The previous prime is 311907811. The next prime is 311907829. The reversal of 311907812 is 218709113.

It can be written as a sum of positive squares in only one way, i.e., 302272996 + 9634816 = 17386^2 + 3104^2 .

It is not an unprimeable number, because it can be changed into a prime (311907811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38988473 + ... + 38988480.

It is an arithmetic number, because the mean of its divisors is an integer number (90973113).

Almost surely, 2^311907812 is an apocalyptic number.

It is an amenable number.

311907812 is a deficient number, since it is larger than the sum of its proper divisors (233930866).

311907812 is a wasteful number, since it uses less digits than its factorization.

311907812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77976957 (or 77976955 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 32.

The square root of 311907812 is about 17660.9119809822. The cubic root of 311907812 is about 678.1754809539.

The spelling of 311907812 in words is "three hundred eleven million, nine hundred seven thousand, eight hundred twelve".