3122943816 has 64 divisors (see below), whose sum is σ = 8227814400. Its totient is φ = 985048128.

The previous prime is 3122943779. The next prime is 3122943821. The reversal of 3122943816 is 6183492213.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 444765 + ... + 451731.

It is an arithmetic number, because the mean of its divisors is an integer number (128559600).

Almost surely, 2^3122943816 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3122943816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4113907200).

3122943816 is an abundant number, since it is smaller than the sum of its proper divisors (5104870584).

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

3122943816 is a wasteful number, since it uses less digits than its factorization.

3122943816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7978 (or 7974 counting only the distinct ones).

The product of its digits is 62208, while the sum is 39.

The square root of 3122943816 is about 55883.3053424724. The cubic root of 3122943816 is about 1461.6881417661.

The spelling of 3122943816 in words is "three billion, one hundred twenty-two million, nine hundred forty-three thousand, eight hundred sixteen".