312440012 has 12 divisors (see below), whose sum is σ = 547535520. Its totient is φ = 156001296.

The previous prime is 312439969. The next prime is 312440017. The reversal of 312440012 is 210044213.

It is a super-2 number, since 2×312440012² = 195237522197120288, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (312440017) 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, 51443 + ... + 57194.

It is an arithmetic number, because the mean of its divisors is an integer number (45627960).

Almost surely, 2^312440012 is an apocalyptic number.

It is an amenable number.

312440012 is a deficient number, since it is larger than the sum of its proper divisors (235095508).

312440012 is a wasteful number, since it uses less digits than its factorization.

312440012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109360 (or 109358 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 312440012 is about 17675.9727313662. The cubic root of 312440012 is about 678.5609793742.

Adding to 312440012 its reverse (210044213), we get a palindrome (522484225).

The spelling of 312440012 in words is "three hundred twelve million, four hundred forty thousand, twelve".