312979816 has 16 divisors (see below), whose sum is σ = 591459840. Its totient is φ = 155257200.

The previous prime is 312979811. The next prime is 312979841. The reversal of 312979816 is 618979213.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (312979811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153010 + ... + 155041.

It is an arithmetic number, because the mean of its divisors is an integer number (36966240).

Almost surely, 2^312979816 is an apocalyptic number.

It is an amenable number.

312979816 is a deficient number, since it is larger than the sum of its proper divisors (278480024).

312979816 is a wasteful number, since it uses less digits than its factorization.

312979816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 308184 (or 308180 counting only the distinct ones).

The product of its digits is 163296, while the sum is 46.

The square root of 312979816 is about 17691.2355701912. The cubic root of 312979816 is about 678.9515388120.

The spelling of 312979816 in words is "three hundred twelve million, nine hundred seventy-nine thousand, eight hundred sixteen".