3120400312 has 16 divisors (see below), whose sum is σ = 5975235360. Its totient is φ = 1527004224.

The previous prime is 3120400301. The next prime is 3120400331. The reversal of 3120400312 is 2130040213.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4149093 + ... + 4149844.

It is an arithmetic number, because the mean of its divisors is an integer number (373452210).

Almost surely, 2^3120400312 is an apocalyptic number.

It is an amenable number.

3120400312 is a deficient number, since it is larger than the sum of its proper divisors (2854835048).

3120400312 is a wasteful number, since it uses less digits than its factorization.

3120400312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8298990 (or 8298986 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

The square root of 3120400312 is about 55860.5434273602. The cubic root of 3120400312 is about 1461.2912065192.

Adding to 3120400312 its reverse (2130040213), we get a palindrome (5250440525).

The spelling of 3120400312 in words is "three billion, one hundred twenty million, four hundred thousand, three hundred twelve".