3996400040 has 16 divisors (see below), whose sum is σ = 8991900180. Its totient is φ = 1598560000.

The previous prime is 3996400039. The next prime is 3996400087. The reversal of 3996400040 is 400046993.

It is a happy number.

3996400040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 3984386884 + 12013156 = 63122^2 + 3466^2 .

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, 49954961 + ... + 49955040.

Almost surely, 2^3996400040 is an apocalyptic number.

It is an amenable number.

3996400040 is an abundant number, since it is smaller than the sum of its proper divisors (4995500140).

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

3996400040 is a wasteful number, since it uses less digits than its factorization.

3996400040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99910012 (or 99910008 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 35.

The square root of 3996400040 is about 63217.0866143007. The cubic root of 3996400040 is about 1586.9246940096.

The spelling of 3996400040 in words is "three billion, nine hundred ninety-six million, four hundred thousand, forty".