3120402440 has 16 divisors (see below), whose sum is σ = 7020905580. Its totient is φ = 1248160960.

The previous prime is 3120402413. The next prime is 3120402463. The reversal of 3120402440 is 442040213.

It can be written as a sum of positive squares in 2 ways, for example, as 2724631204 + 395771236 = 52198^2 + 19894^2 .

It is a super-2 number, since 2×3120402440² = 19473822775115907200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 39004991 + ... + 39005070.

Almost surely, 2^3120402440 is an apocalyptic number.

It is an amenable number.

3120402440 is an abundant number, since it is smaller than the sum of its proper divisors (3900503140).

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

3120402440 is a wasteful number, since it uses less digits than its factorization.

3120402440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78010072 (or 78010068 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 3120402440 is about 55860.5624747907. The cubic root of 3120402440 is about 1461.2915387016.

Adding to 3120402440 its reverse (442040213), we get a palindrome (3562442653).

The spelling of 3120402440 in words is "three billion, one hundred twenty million, four hundred two thousand, four hundred forty".