3120421440 has 112 divisors (see below), whose sum is σ = 10149108480. Its totient is φ = 811806720.

The previous prime is 3120421411. The next prime is 3120421453. The reversal of 3120421440 is 441240213.

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, 280 + ... + 78999.

It is an arithmetic number, because the mean of its divisors is an integer number (90617040).

Almost surely, 2^3120421440 is an apocalyptic number.

3120421440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3120421440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5074554240).

3120421440 is an abundant number, since it is smaller than the sum of its proper divisors (7028687040).

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

3120421440 is a wasteful number, since it uses less digits than its factorization.

3120421440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79340 (or 79330 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 3120421440 is about 55860.7325408466. The cubic root of 3120421440 is about 1461.2945046100.

Adding to 3120421440 its reverse (441240213), we get a palindrome (3561661653).

The spelling of 3120421440 in words is "three billion, one hundred twenty million, four hundred twenty-one thousand, four hundred forty".