3121444040 has 128 divisors (see below), whose sum is σ = 8290598400. Its totient is φ = 1042744320.

The previous prime is 3121444019. The next prime is 3121444093. The reversal of 3121444040 is 404441213.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 3121443997 and 3121444015.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1308689 + ... + 1311071.

It is an arithmetic number, because the mean of its divisors is an integer number (64770300).

Almost surely, 2^3121444040 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 3121444040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4145299200).

3121444040 is an abundant number, since it is smaller than the sum of its proper divisors (5169154360).

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

3121444040 is a wasteful number, since it uses less digits than its factorization.

3121444040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2647 (or 2643 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 3121444040 is about 55869.8849112829. The cubic root of 3121444040 is about 1461.4541151608.

Adding to 3121444040 its reverse (404441213), we get a palindrome (3525885253).

The spelling of 3121444040 in words is "three billion, one hundred twenty-one million, four hundred forty-four thousand, forty".